Fix "-" texture on line texture overlay issues
Fix potential crash on certain map check fixes
Merge pull request #155 from Blue-Shadow/master

Added APROP_StencilColor constant to ACS syntax highlight config.
Fix texture property browse button not showing up
Correct some minor things in udmf configurations
Expand all categories in map texture browser by default
Merge branch 'master' of https://github.com/sirjuddington/SLADE.git
Fix resource checkboxes on map launcher dialog

Unchecking an open archive will correctly not use any resources from it
Fix potential crash on closing properties dialog for a line
Fix wx debug assert on selecting new map name/format
Added GetActorPowerupTics function to the ACS language configuration.