Fixed, "Find Linedef Action and Arguments" and "Find Sector Effect" search modes: in some cases action/effect was checked incorrectly when performing a search.
Added, "Find Sector Effect" search mode: "Any effect" (-1) can now be used as a search input.
Fixed, "Find Linedef Action and Arguments" search mode: generalized actions search was broken.
Fixed, General interface: in some cases the placeholder test engine was displayed in the "Test Map" drop-down.
Fixed, Map Analysis mode: fixed a crash when trying to dissolve an invalid sector when one of it's linedefs referenced it on the both sides.
Fixed, Sectors mode: fixed incorrect undo description when deleting sectors.
Internal: joined declaration and assignment of some more variables.
Fixed, Texture Browser Form: well, I broke "Tab" key functionality again (in previous commit)...
Maintenance: changed curly braces style to match DB2 one (hopefully not breaking anything in the process...).
Maintenance: changed private method names casing to match DB2 one.
"Find Any Texture or Flat", "Find Sector Flat" and "Find Sidedef Texture" options now support "*" (match any number of characters) and "?" (match any single character) wildcards.
"Find Any Texture or Flat" is now available any game configuration (previously it was disabled when "MixTexturesFlats" game configuration option was disabled, now only "Replace" functionality is disabled).
"Find Thing Flags" and "Find Linedef Flags" can now replace flags.
Added "Find Sidedef Flags" and "Find Sector Flags" search options.
