Pressing the home button in settings should go home

[rptb1]

Is your feature request related to a problem? Please describe.
I often find myself pressing the home button when I'm in the settings screen, then being surprised that nothing happens.

Describe the solution you'd like
It would be nice if pressing the home button when in the setting screen went back to the home screen (i.e. dismissed the settings).

Describe alternatives you've considered
I'm aware of the "X" button but I nearly always press home first and so get interrupted.

Additional info
It's just a tweak that would make me happy.

[jrpie]

I implemented this as part of my fork (https://github.com/jrpie/Launcher/), see ef16d70
Since many of the changes I made are a matter of taste (and this repo doesn't seem to be actively maintained any more) I decided not open a PR but just publish it as a separate app.