GUI dockwidget toolbars when undocked

[Richard]

Hi,

I submitted a patch to the patch tracker (#7867) to make the editor have 
a proper window toolbar when it is undocked with minimise, maximise 
buttons etc.

If people agree this is good, should all the dock widgets have this 
functionality by default? If so I propose creating an ovtave_dock_widget 
class or similar which inherits from the QDockWidget and which is 
actually used by the other components instead of inheriting directly 
from QDockWidget and has this functionality by default.

Thoughts?

Richard

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