[Gtkradiant] [Bug 633] New: Add ability to change default color in 3D window

[gtkradiant@zerowing.idsoftware.com]

http://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=633

           Summary: Add ability to change default color in 3D window
           Product: GtkRadiant
           Version: 1.3
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: editor
        AssignedTo: ttimo@idsoftware.com
        ReportedBy: nib@nibsworld.com


Add the ability to change the default color of the 3D window background.
Currently its a concrete grey color and when I'm working with a lot to concrete
colored textures (for Wolfenstein) it all kinda blends together.