Govibe Process Manager v3 Fedora clean launcher

Changes:
- User install still works even if accidentally launched with sudo.
- Launcher filters GTK/Python warning spam but keeps real errors.
- Disabled legacy Gtk.StatusIcon fallback on Fedora/GNOME to stop repeated scale-factor warnings.
- Use Ctrl+C or close the window to exit from terminal. Ctrl+Z only suspends the app.
