Add a title label to the pages. Use QGroupBoxes throughout.
Extend SavedAction to work with checkable QGroupBoxes. Polish UI files,
use common layout for VCS plugins. Performance: Apply only visited
settings pages. Add search keywords.
Task-number: QTCREATOR-26
Make Gui app wizard use Qt Designer wizard code to write the classes.
Remove the settings from the form class wizard page extension area and
add a settings page instead. Polish the designer plugin's structs to
parametrize class generation with QSharedData and settings code.
Export them and use them in the Gui app wizard.
Task-number: 256927
