Describe the bug
When setting the Launch String Template in the UI for any given game, the settings will only persist in the UI until the game is ran, after the game runs the UI displays the default string ( "{}" ).

The launch string does get saved, as launching it a second time results in the customized launch string being used, the bug seems to only be UI side.

To Reproduce
Steps to reproduce the behavior:

1. Go to a games options.
2. Write any valid template. (e.g. PROTONPATH=GE-Proton {})
3. Save and launch the game.
4. Check the Launch String Template in the game settings, and it's reset.

Expected behavior
The Launch String Template in the UI should persist.

Desktop (please complete the following information):

• OS: Arch Linux
• App Version: 0.3.0-1 AUR

Additional context
As mentioned above, the issue seems to only be UI side, as observing the terminal when running the app launches the games with the same string despite it disappearing from the UI.