New shortcuts

[mlerjen]

### Steps to reproduce

1. Shortcuts are a cool thing

Actual behaviour

1. Not every function has a shortcut.

Expected behaviour

1. Add X for cut-away
2. Consider adding shortcuts to Android functions as well. The basic set would contain shortcut for zoom in, zoom out, center map to gps position and open/close template dialog. Being able to trigger shortcuts with a minimal external BT keyboard would smoothen the Android workflow very much.

Configuration

Mapper Version: 0.9.5 Operating System: Windows&Android

[puzzlepaint]

Regarding point 1.: Here is a PR that sets X as a shortcut for "Cut away from area": #2013 (Of course, ideally the shortcuts should really be configurable in the program.)

[dg0yt]

ideally the shortcuts should really be configurable in the program.

Still waiting for a usable shortcut editor.

[ollesmaps]

How far is the option to give voice commands in Android? I imagine this would be ideal for shortcuts. It could streamline the process even more.

[mlerjen]

I realize that X was added as a short-cut for "Cut away from area", while the original request was to apply it to "Cut away", which since then was renamed to "Erase area". ...