Decide whether to use "continuous check"

[AlexPerathoner]

• [ ] Check if "continuous check" is useful on Macs with Touch Bar only
• [ ] If so, SlimHUD should recognise on its own if the device has a Touch Bar, and enable / disable "continuous check" on its own. Should re-do check each time the display settings change (possibly MacBook with Touch Bar connected / disconnected)
• [ ] Option in settings could be removed (can't think of situation where it could be still useful / maybe when changing volume with software?)
• [ ] Should still be possible to activate, for ui tests to work

[AlexPerathoner]

From Apple's NSTouchBar reference:

There is no need, and no API, for your app to know whether or not there is a Touch Bar available. Whether your app is running on a machine that supports the Touch Bar or not, your app’s onscreen user interface (UI) appears and behaves the same way.