Fixed: VirtualSectorField was cleared from sector properties when pasting map geometry in Doom/Hexen map formats leading to incorrect sector assignment [I broke this in r2009, so it seems].

MakeSVNRelease.bat: changed log start revision from 1 to 1496 (GZDB's second commit).

Fixed, Classic modes: Alt-dragging map elements (e.g. "snap to grid increment while dragging" mode) was not working properly.

Map Analysis, internal: some ErrorCheckers and ErrorResult had inconsistent namespaces.
Thing Edit forms, internal: optimized missing flags check a bit.

Thing Edit Form: a warning is now displayed when a thing doesn't have any skill or class or game mode flags.
Game Configurations: moved "thingflagscompare" from Game to Map format blocks. "Check stuck things" check now works properly in Doom/Boom game configurations.
Map Analysis: fixed a possible crash during "Check texture alignment" check.
Map Analysis: ResultStuckThingInLine now highlights both thing and line.
Map Analysis: ResultStuckThingInThing now highlights both things and allows to delete any of them.
Internal, Map Analysis: rewritten parts of "Check stuck things" class.
Internal, Map Analysis: changed the way processed stuff is stored in "Check texture alignment" class.
Internal: changed CurrentDomainOnUnhandledException, so ExceptionDialog with proper info shows up even if adding exception to the Event Log failed.
Internal: changed format, in which thingflagscompare info is stored.

Fixed incorrect syntax in ZDoom_DECORATE.cfg.

Map Analysis form: fixed a crash caused by running analysis, opening another map then trying to run analysis again.
Map Analysis form: error checks are now alphabetically sorted.
Map Analysis form: added "Toggle All" check box.
Internal: CheckboxArrayControl now has Sort() method.
More fixes in ZDoom_DECORATE.cfg

Scripting: added A_DamageSelf, A_DamageTarget, A_DamageTracer and CheckClass definitions, fixed a bunch of inconsistencies in ZDoom_DECORATE.cfg.

Cosmetic: changed Angle Control's outline color.

Added: Map Analysis: added "Check texture alignment" check. Currently it works only in Doom/Hexen map formats.

More changes in ZDoom_linedefs.cfg.

Fixed: Drag Geometry Mode: dragged sectors, linedefs or vertices were snapped to 0, 0 in some cases when trying to snap them to a linedef fully inside of a grid cell.

Fixed: Visual mode: "Select" action with "with the same textures" / "with the same height" modifiers (Shift/Ctrl + LMB) was not working properly when used on vavoom-type 3d floor sidedefs.
Fixed: Visual mode, UDMF, "Auto-align textures" actions: vertical texture offset was calculated incorrectly for vavoom-type 3d floors.

Visual mode: "Select" action with "with the same textures" / "with the same height" modifiers (Shift/Ctrl + LMB) now works properly with vavoom-type 3d floors.

Visual mode: "Select" action with "with the same textures" / "with the same height" modifiers (Shift/Ctrl + LMB) now works when used on floors and ceilings of a 3d floor.

MODELDEF parser: fixed a crash when trying to add a model definition when another one was already created for the same actor.
ZDoom_DECORATE.cfg: added A_SetSpeed definition.

Visual mode: vertex handle size is now updated after closing the Preferences form.

Preferences Form: renamed "Scale models in visual modes" to "Stretched view in visual modes". When enabled, this setting now increases vertical scale of the world and sprites in visual mode instead of decreasing vertical scale of models.

Sector slopes were not copied by "Copy Properties" actions and were missing from Paste Properties Options form.
Added several missing flags to ZDoom_DECORATE.cfg.

Visual mode: "Select" action with "with the same textures" / "with the same height" modifiers (Shift/Ctrl + LMB) now works when used on sides of a 3d floor.
Visual mode: "Select" action with "with the same textures" modifier (Shift + LMB) now selects adjacent sidedefs only when their height intersects with the height of the current sidedef.
Visual mode: "Select" action with "with the same textures" modifier (Shift + LMB) was not selecting connected one-sided sidedefs when used on a sidedef without a texture.
Cosmetic: fixed a couple of action descriptions in BuilderModes' Actions.cfg.
Cosmetic: MainForm.UpdateToolStripSeparators was working incorrectly in some cases.
Cosmetic: ErrorChecksForm's title was not updated when no errors were found.

Reformatted debug output from previous commit so it no longer generates compilation warnings when compiling in Release mode.

The editor will fail more gracefully when no D3D device is detected.
In some cases the editor was constantly checking D3D device availability when minimized.
Added more DX-related debug output (only in Debug builds). 

Fixed: certain UDMF-only properties were not cleared when pasting map elements from UDMF to non-UDMF maps.
Fixed a bug introduced in r2043: helper objects were not updated in some cases.

More changes to Hexen_linedefs.cfg and ZDoom_linedefs.cfg.

Preferences: added "Vertex scale (3D)" preference, renamed "Vertex scale factor" to "Vertex scale (2D)".

Linedef Edit Form, UDMF: missing activation flags warning is now displayed only for linedef actions with "requiresactivation" property set in a game configuration.
Game configurations: fixed a couple of property names, added more enums & default values.
Updated BCC compiler to rev. 20140818r2.

Linedef Edit Form, UDMF: added less annoying warning about missing activation flags (no checks if an action actually requires activation yet...)

Sector Edit Form (UDMF): sector brightness value was processed incorrectly when relative value was entered.
Internal: added "ButtonStepsWrapAround" property to ButtonsNumericTextbox.
Internal, SectorEditFormUDMF: more changes to Slopes tab. Still not operational... 

Sector Edit Form: added "height offset" input. It can be used to change floor and ceiling height by given value. Also added some tooltips.