WIP #5: Added actions bar and first cardwidget.
WIP #5: Actionsbar implemented as part of InformationModel/Delegate.
All dialogs now follow the new design. Much code cleaning.
Added icons for actions and fine-tuned some ui aspects.
GameWindow column sizes now adjust when resizing
GameWindow: Double clicking rounds works again.
Restored most of the previously available functionality.
Bugfix
Dialogs now close, when the tableview beneath it is being clicked.
Merge branch 'refs/heads/master' into feature5-gameWindowRedesign

Conflicts:
	src/ui/widgets/gamestogetherwidget.cpp