Get rid of fbBreakOnImageDisabled, fbBreakOnImageActive and
fbBreakOnNextButtonOld
Removed unused condition editor images
Converted question mark to path to avoid incorrect display on different
machines
issue6257: simplify Console.getDefaultReturnValue()
Issue 6422: Add a right click option for accessing objects in the Command Line

http://code.google.com/p/fbug/issues/detail?id=6422
Removed FBTrace unrelated styles
Replaced Mac OS Command Line History, close, minimize and detach icon by
SVG equivalents
Merge branch 'master' of https://github.com/firebug/firebug into issue4979