Bring package_development, package_games, package_graphics, package_network, package_multimedia, package_wordprocessing, edu_science, package_utilities, input_devices_settings, kcmsystem, personal, and looknfeel icons into XDG compliance

modules/TDEMacros.cmake

@@ -175,6 +175,9 @@ macro( tde_install_icons )
         if( "${_group}" STREQUAL "filesys" )
           set( _group  "places" )
         endif( "${_group}" STREQUAL "filesys" )
+        if( "${_group}" STREQUAL "category" )
+          set( _group  "categories" )
+        endif( "${_group}" STREQUAL "category" )
         if( "${_group}" STREQUAL "device" )
           set( _group  "devices" )
         endif( "${_group}" STREQUAL "device" )