[Gtkradiant] [Bug 17] Improve Entity Inspector's handling of multiple-entity selections

[gtkradiant@zerowing.idsoftware.com]

http://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=17

wjoseph@europe.ea.com changed:

           What    |Removed                     |Added
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            Summary|Spawnflags issues / tristate|Improve Entity Inspector's
                   |checkboxes / new entity     |handling of multiple-entity
                   |inspector                   |selections