UI: Set correct text in system tray on startup

The system tray assumed all outputs are inactive when it's initiated,
however outputs can be active if started via command line options. This
caused the wrong (only) text to be set if the output was in fact active.
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Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f