- Updated help menu web links (removed map-center.com, added ETB documentation) ...

- Updated help menu web links (removed map-center.com, added ETB documentation) (Shaderman)
- Added check for existing worldspawn if a new one should be added with the entity menu (Shaderman)
- Fixed Entity -> Ungroup (Topsun)
- Fixed hotkey collision ALT+M (filter botclip/Modify menu). New Modify shortcut = ALT+O (Shaderman)
- Updated Window Layout images (Shaderman)
- Fixed (TODO) XYWindow: save show-workzone option (Shaderman)
- Fixed (TODO) Toolbar: add shortcut to tooltips for toolbar buttons (Shaderman)
- Fixed (TODO) GUI: detachable submenus (Shaderman)

git-svn-id: svn://svn.icculus.org/gtkradiant/GtkRadiant/trunk@117 8a3a26a2-13c4-0310-b231-cf6edde360e5