Yes, please! I agree with this. I use Excel a lot (main reason I need f.lux) and alt+PgUp is the shortcut to scroll across spreadsheets.
So I have to click in f.lux, click Options and Smart Lighting, check the Hotkeys to On, adjust the brightness, then check Hotkeys to off. It's too many clicks!
Either the option of changing a Hotkey or a simple brightness slider would be brilliant. Thank you!