Fix: stop button on game page

[Ishidawg]

Closes (I guess) #5527

Does not disable play button when is.playing.

I've run:

• pnpm run i18n
• pnpm prettier
• pnpm codecheck
• pnpm test

The test was made on Linux using the .appImage build generated by pnpm dist:linux.

Use the following Checklist if you have changed something on the Backend or Frontend:

• Tested the feature and it's working on a current and clean install.
• Tested the main App features and they are still working on a current and clean install. (Login, Install, Play, Uninstall, Move games, etc.)
• Created / Updated Tests (If necessary)
• Created / Updated documentation (If necessary)