MapSet.NearestLinedefRange using a blockmap now takes into account that the maxrange could be bigger than the blockmap block size

Linedefs Mode: fixed a problem where after splitting a linedef the insert vertex preview would not work correctly
Vertices Mode: fixed a problem where after inserting a vertext the insert vertex preview would not work correctly

Draw Geometry Modes: removed status messages expressing negative feeling when finishing a drawing and replaces them with positive messages

The exception dialog now correctly states that it's UDB and not GZDB

Texture browser: using the tab key to jump between the currently selected used texture and the position of the texture in the list of all textures works again (this time without toggling the "used textures on top" checkbox). Also added option to vertically center the view on the selected texture (enabled by default)

New map dialog: the "open map resources in read-only mode" option is now checked by default. This option is deprecated and will be removed entirely eventually

Visual Mode: changed name from "GZDB Visual Mode" to simply "Visual Mode". The naming difference was for historical reason that doesn't apply anymore. Also reverted the mode icon to the original one

Linedef edit form (UDMF): fixed a problem where the first argument was set to 0 instead left blank when multiple lines with script execution actions were being edited

Linedefs Mode, Sectors Mode, Vertices Mode, Sound Environment Mode, Sound Propagation Mode: slightly improved performance when moving the mouse

Visual Mode: fixed a problem where wide classic skies were not rendered with the correct orientation

Thing/Linedef/Sector editing dialog: fixed a crash when pressing the up key in the action input box when the last action is selected. Fixes #493.

Configuration file parser: floating point numbers without the "f" suffix are now parsed as double precision floating point numbers

ACS parser: fixed a bug that prevented scripts from being recognized when the previous line ended with an empty line comment

Texture browser: filtering for a texture name now automatically selects the best matching texture name. Addresses #483.

Visual Mode: fixed a bug where selected 3D floor tops/bottoms would appear to be selected after undo, but actually weren't selected anymore

Visual Mode: fixed a bug where the line slope things (9500 and 9501) would slope the same sector multiple times when multiple lines of the same sector were tagged to the thing. Fixes #491.

Copy/Past thing properties: fixed a crash when pasting properties from a thing that has no model assigned to a thing that has a model applied

Added preliminary DECALDEFS support. Parsing works, indexed decals and decal groups can be selected as the first argument of the Decal thing. Decals are not displayed in Visual Mode, decals without an index are not supported

Fixed a bug where PNG sprites without an offset incorrectly had their offset centered instead of using (0, 0)

When loading UDMF maps and fields that have NaN (not a number) as a value are encountered those fields will now be dropped permanently. A warning that this happens will be displayed in the Errors and Warnings dialog.