#define WORLDED
Fixed TileLayersPanel not showing layers in the current level sometimes.

If a non-tile layer was selected in a different level, the list of layers
wouldn't be updated.
Added a tool and dialog for changing RoomDef names.
Fixed bug in RoomDefecator's flood-fill.
Fixed a crash with object tool context menu.

Wasn't checking for clickedObjectItem == 0.
Added object labels and mouse-over highlighting.
Fixed issue when right-clicking while resizing an object.

Right-clicking pops up the object tool's context menu, which breaks resizing
map objects somehow.