Review Request: add the button color to Plasma::Theme

[Marco Martin]

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http://reviewboard.vidsolbach.de/r/123/
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Review request for Plasma.


Summary
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this adds button text and button background color roles for the plasma theme and uses it in the proper widgets (button and tabbar for now)

on a related note, would make sense to support other colorsets too, like view and tooltip?


Diffs
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  /trunk/KDE/kdebase/workspace/libs/plasma/private/nativetabbar.cpp
  /trunk/KDE/kdebase/workspace/libs/plasma/theme.h
  /trunk/KDE/kdebase/workspace/libs/plasma/widgets/pushbutton.cpp

Diff: http://reviewboard.vidsolbach.de/r/123/diff


Testing
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Thanks,

Marco