[Linux] Wine-Manager format ETA to HH:MM:SS

[Nocccer]

Fixed digits could not be resolved, because package filesize does not offer such option.

---

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)