QToolButton is not really designed to be used in the way we did and since
QPushButton supports having a menu attached to, we can replace tool buttons
in most cases.
* Fix the presentation of the TabButtonWidget by updating RareStyle's css
* Reduce the size of the top tab bar to save vertical space.
* Remove infoLabel property
The default widgets only implement the settings for the `default` "app_name"
The game specific widgets sub-class the default widgets and implement
whatever they additionally need locally.
Remove multiple calls to save config and save when the game settings gets hidden.
Previously a lot of things would start running concurrently at
startup as we were setting up the UI. This removes a considerable
amount of perceived delay.
Note: there are better ways to make sure forms are populated when they
are viewed, such as each widget's `showEvent()`
This allows to complete from relative paths, such use exe override
Fix constructor argument names to follow Qt's types.
Set the same filters as the dialog for the completer.
Use the completer's icon provider for the dialog.
Force Rare to use Qt's file dialog instead of the native one.
