Since many lines were changed due to components being reused, the more
important are listed below per file. Static strings were moved to the UI files for
translation purposes and some messages have been re-worded.
`extra_widgets.py`: PathEdit now contains the save button and the dialog can also filter by name, all forms using it have been updated
`rare.py`: Updated the look and fixed a bug where the Image Directory wouldn't change if `img_dir` wasn't specified in the settings file
`legendary.py`: Update the look, changed the Max Workers option into a SpinBox
`linux.py`: Update the look, changed Wine Executable option in to a PathEdit that filters for `wine` and `wine64`.
`game_settings.py`: Updated to reflect the changes in `linux.py` settings widget. Added the system `compatibilitytools.d` to be search for potential proton versions
