Feature suggestion: improved monitor device handling

[ScribbleGhost]

I really enjoy this application 💓 Much respect!

I am using Twinkle Tray on a laptop and every time I disconnect the laptop from my monitor I have to exit Twinkle.

Why?

Well, I am using Twinkle Tray to schedule screen brightness. But only for my main monitor. The laptop has a entirely different brightness. Needless to say, ever time I disconnect my monitor and switch over to the laptop the brightness settings don't apply anymore. Which is why I need to manually start and stop Twinkle Tray depending on which monitor I am using.

Perhaps we could simplify this by either:

1. Separate brightness schedules for each monitor.
2. Start/stop Twinkle Tray depending on whether or not an external monitor is connected.