Tray icon

[Georgiy-Timoshin]

I would like to add the ability to:

1. Hide the tray icon, and when you try to run the second instance, the first one opens (if possible).
2. Display in the tray instead of the icon the readings of the selected temperature sensor.
3. When hovering the mouse over the tray icon, display brief information about the state: temperature, fan speed (exactly those sensors that are involved in the adjustment).
   P.S. Add an "About" button next to the "Donate" button.