Changed, Thing and Linedef Edit Forms, script selector drop-downs: scripts from include files are now shown using different color and after the map scripts.
Fixed, Visual mode, UDMF: sector geometry cache was not updated after using "Match Brightness" and "Change Brightness" actions on ceilings, so the changes made by them were not visible when using Classic modes in "View Ceiling Textures" mode.
Fixed, Visual mode, UDMF: "Match Brightness" and "Change Brightness" actions set brightness incorrectly in some cases.
Fixed: ACS script names gathering logic was unable to process relative #include and #import paths (like '#import "..\acs\qtilt.acs"').
Updated ZDoom_DECORATE.cfg.

Fixed apply/cancel buttons positions in Randomize Sectors/Things/Vertices windows. 

Changed, "Make Brightness Gradient" action: MAPINFO FadeColor and OutsideFogColor properties are now used when first or last sector doesn't have "fadecolor" property when making a fade gradient.
Fixed (probably), D3DDevice: looks like CreatePresentParameters() can also throw "D3DERR_DEVICELOST" error in some cases...

Updated ZDoom_DECORATE.cfg.

Fixed, MODELDEF parser: looks like INHERITACTORPITCH and INHERITACTORROLL flags affect only pitch/roll set in the map editor, not "PitchOffset" and "RollOffset" MODELDEF properties...

Fixed, TEXTURES parser: fixed incorrect stream rewinding when reading "Blend" patch property without a tint amount.

Fixed, Visual mode: "Paste Texture Flood-Fill" action used long texture names regardless of current setting in Map Options.
Internal: "uselongtexturenames" setting is now stored in map settings file, not in the program configuration file.
Fixed, Color Picker plugin: in some cases mouse movement was processed incorrectly.
Fixed, Color Picker plugin: float color value output was culture settings-dependant.

Error Check form: number of selected items is now shown in the window's title.
Error Check form: fixed slowdowns when trying to select many (like 1000) results at once.

Fixed, Sectors mode: selection info and highlight were not updated after using "Join Sectors" and "Merge Sectors" actions.
Linedefs mode: "Update 'lightfog' flag" was missing the click event handler.

Sector drawing: basic properties (textures, brightness, floor and ceiling height) are now taken from the nearest sector when a new isolated sector (e.g. a sector, which doesn't not intersect with already existing map geometry and is not inside of it) is drawn. 
Visual mode: when "Synch camera position" setting is enabled, and the cursor was outside of a sector when entering Visual mode, camera height is now adjusted based on nearest sector (previously the height was adjusted only when the cursor was inside of a sector).  
"Auto-align textures X", "Auto-align textures X and Y" actions, UDMF: alignment source sidedef part's horizontal scale is now applied to all aligned sidedefs.
Visual mode, UDMF: 'lightfog' flag is now automatically updated when changing sidedef brightness or using "Match Brightness" action. 
Linedefs mode: added "Update 'lightfog' flag" menu item.
Game configurations: cosmetic changes in UDMF linedef flag names.
Updated ZDoom_DECORATE.cfg.

Fixed, Visual mode, 3D floors: in some cases 3d floor flags were handled differently than in GZDoom.

Fixed, Edit Selection: in some cases thing angles were updated incorrectly when things with "FixedRotation" game configuration property were among selected things.
Fixed, Visual mode: floor brightness was calculated incorrectly when "Disable Light Effects"/"Restrict light inside" 3d floor flags were used and the floor had "lightfloor" property.
Fixed: "lightabsolute" flag was accessed incorrectly in previous commit.

Fixed, long texture names support: in some cases long texture names were not processed correctly when pasting map geometry.
Fixed, Visual mode: in some cases combined sidedef brightness was calculated incorrectly. Also, MAPINFO FadeColor and OutsideFogColor properties are now taken into account.
Hexen_linedefs.cfg: "Door Raise" and "Door Locked Raise" used incorrect enums for "Close Delay".

Updated documentation.

ZDoom_linedefs.cfg: "Plane" actions don't require activation.

Visual mode, "Raise Floor/Ceiling to adjacent sector", "Lower Floor/Ceiling to adjacent sector": things with "absolutez" flag should be handled differently. 

Fixed, Visual mode: in some cases "Raise Floor/Ceiling to adjacent sector" was not working properly when used on things.

Fixed, Visual mode: a case when thing's height was bigger than distance between floor and ceiling's planes is now handled the same way as in ZDoom.

Fixed, Visual mode: when thing's position is not absolute, it should always be positioned between floor and ceiling planes.

Sound Environment mode: you can now add sound environment things using "Insert Thing" or "Edit Selection" actions (just like you add things in Things mode).
Sound Environment mode: you can now delete currently highlighted sound environment thing by using "Delete" action.
Sound Environment mode: the sidebar panel icons now have the same colors as corresponding sound environments.
Fixed, Sound Environment mode: in some cases several sidebar panel items were highlighted at once (I broke this in r2201).
Fixed, Fit Textures action: lower linedef parts were aligned incorrectly.
Changed, Fit Textures Options form: "Fit across multiple surfaces" checkbox is now disabled when the action is applied to a single surface.

Fixed, Sectors Mode, UDMF: "Make Brightness Gradient" action was not working when "Sector Brightness" mode was selected... 

Visual mode, UDMF: renamed "Scale Texture Up/Down (X/Y)" actions to "Increase/Decrease Horizontal/Vertical Scale". These actions can now be used on things.

Fixed, DECORATE parser: "scale", "xscale" and "yscale" properties are now parsed the same way as in ZDoom.
Fixed, DECORATE parser: parser was unable to parse negative numeric properties.

Fixed, Texture previews: texture size labels were displaying incorrect size or no size at all when showing TEXTURES textures with negative scale.
Fixed, Visual mode, UDMF: when several wall parts were selected, only one could be dragged with the mouse.
Fixed, Visual mode, Auto-align textures, UDMF: TEXTURES scale is now taken into account when aligning textures.
Fixed, Visual mode, Auto-align textures (Y), UDMF: nearest height matching is now applied to non-wrapped middle backsides.
Cosmetic changes in ZDoom_ACS.cfg.

Linedef/Thing Edit forms: cosmetic changes to named/numbered script drop-down locations.

Changed, Edit Sector/Linedef/Thing/Vertex forms: undo is now created either when user changes a value using a real-time control or when applying changes, not when opening a form.

Updated ZDoom_DECORATE.cfg.

Changed, Sound Environment mode: on second thought, we don't need to scan all map things to find one to highlight...

Sound Environment Mode: sound environments can now be picked by editing sound environment things.
Sound Environment Mode: detected sound environments names are now used as item names in the tree view.
Fixed, Classic modes: incorrect texture was used as unknown floor/ceiling texture (I broke this in r2199).
Fixed, MainForm: reverted MainForm.UpdateToolStripSeparators. By making it look simpler I made it work more buggy...
Updated ZDoom_DECORATE.cfg.

Fixed: flats and textures defined in TEXTURES should override regular ones (adding long texture names support broke this).
Removed unused references from all projects.

Changes since 5bf51d0:
Large scale cleanup & refactoring.
Sound Propagation Mode: you can now click on doublesided linedefs to toggle sound blocking flag.
Sound Environment Mode: you can now click on doublesided linedefs to toggle sound zone boundary flag.
Sound Propagation Mode: reimplemented the highlighting of non-deaf things. Things are now highlighted using selection color.
Removed "Show tooltips" checkbox. Tooltips are now always enabled.
Fixed, Sound Environment Mode: thing tooltip about multiple active sound environment things was shown even when there was only one active sound environment thing.
Fixed, Sound Environment Mode: "Configure colors" toolbar button was not working because of missing action.
Fixed, cosmetic: "Configure colors" toolbar icon was missing a tooltip.
Fixed, cosmetic: display was not redrawn after changing colors using "Color configuration" window.

Fixed, Thing Browser Control: "Multiple Things" icon was assigned to BackgroundImage instead if Image.
Updated ZDoom_DECORATE.cfg.