Tray icon indicator colors

I was running canary when I got the alert about being available - mostly because of the red tray icon usually reserved for errors.

Should there maybe be another color (yellow / orange?) or icon (“yield” symbol) for non-critical messages (like updates)?

The tray-icon is not supposed to change when an update is ready. But we could introduce a new “attention required” icon.

The icon sources are here: duplicati/Assets at master · duplicati/duplicati · GitHub