Things: fixed an issue where inserting a new thing would not immediately apply ZScript user variables

Fixed two crashes that happened when trying to reset the grid transform, or toggling the grid visibility while no map was opened

Visplane Explorer Mode: fixed an issue that caused a crash when the map doesn't have nodes the Visplane Explorer Mode understands. Fixes #736

DeHackEd: fixed and issue where the "#" in "ID #" fields was erroneously interpreted as a comment. Fixes #735

DECORATE/ZScript: fixed an crash introduced in 070aa9f3 that happened when a base actor didn't have a thing type info

DECORATE/ZScript: fixed an issue where setting the thing category using the editor key didn't work for replaced actors. Fixes #729

Visual Mode: fixed an issue where using the "apply camera rotation to things" action did not update the thing cages properly

Eternity Engine game configuration: clarified description of the "impact" UDMF linedef flag
Eternity Engine game configuration: added missing "monstershoot" UDMF linedef flag

Fixed an issue that prevented models from being loaded correctly when some model indices in MODELDEF were unused. Fixes #727

The installer will not try to create an icon on the common desktop anymore, but on the user's personal desktop

Draw Settings docker: fixed an issue where toggling the texture check boxes stopped texture overrides from being applied

 - using "-map" with lower case parameter doesn't crash anymore
 - using "-cfg"/"-config" with a non-existing configuration file doesn't crash anymore

Map element associations: fixed a problem where things that have a argument of type tag set to 0 were referencing all things with tag 0. Fixes #718

Linedefs Mode: fixed a crash that could happen when the mouse was moved out of the map control while an UDBScript was modifying the map

UDBScript: fixed a problem in the voodoo doll example script when the "looping" option was set to true

ZScript: fixed an issue where #include files were not parsed when the parent file had a //$GZDB_Skip comment. Fixes #716

Added command palette that allows the user to search for (and execute) commands at any time. Unbound by default. Resolves #555

Sectors Mode: fixed a crash that could happen when the mouse was moved out of the map control while an UDBScript was modifying the map

Edit Selection Mode: improved handling of texture transformation (still doesn't work 100% correctly)

- The updater can now update itself

Map Analysis Mode: fixed an issue where lines were erroneously reported as overlapping in certain situations. Fixes #713

Nodes Viewer Mode: the mode will not engage anymore if ZNODES are found, do to ZDBSP reordering the vertices when rebuilding the nodes. Addresses #659