FE/Qt: file header cleanups.
FE/Qt: 7386: Translate shortcuts-pool itself as well.
FE/Qt: 6065: UIShortcutPool: Make sure corresponding extra-data updated right after shortcuts were changed.
FE/Qt: 6065: Extend UIShortcutPool with direct overrides set support.
FE/Qt: 6065: Saving overridden shortcuts at shortcut-pool cleanup.
FE/Qt: 6065: Extend UIShortcut with the default-sequence information.
FE/Qt: 6065: Some shortcut-pool cleanup.
FE/Qt: 6065: Some shortcut-pool extension/fixes.
FE/Qt: 6065: Global/machine keyboard shortcut processing: Make sure shortcuts will be updated at runtime.
FE/Qt: Renaming UIShortcuts files into UIShortcutPool files. Its an update for r83418.