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
psnewmodel now relinks if qpersistence changes.
Fix: StartWindow crashed when database was empty.
Fix: Stopped using OLD_DokoOfflineGameBuddys. The player relations were not configured correctly which would crash when creating a new database schema for an empty database.
Began work on library management
Merge pull request #17 from lbproductions/library-management

Punkte 1 und 2 schonmal erledigt.
Merge branch 'refs/heads/master' into sparkle-updater

Conflicts:
	src/local_dbconfig.h
	src/main.cpp
	src/src.pro
	src/ui/game/gamewindow.cpp
	src/ui/game/gamewindow.ui