Add option for white grid color
Darken colors of selection/highlight boxes
Update the tool window to use tabbed windows
Add rotation degrees overlay
Fix stretch tools not following mouse correctly
Fix position of rotation degrees display

The position of the display was not always correct depending on the
camera orientation relative to the selection.
Update normalizeDegrees to be exclusive on the -180 end
Fix tabification of tool windows
Remove now-unused *Offset variables
Remove unnecessary overlay property updates
Merge pull request #3884 from huffman/entity-tools-polish

Entity tools polish