Make modifiers custimizeable

Summary

When I want to select an alternative action, I hold the alt key and press up/down and then enter.

To press up/down, I have to move my right hand (on a traditional keyboard) or (with Neo keyboard layout) press a second modifier key plus the direction key. This is not optimal yet.

Suggestion:

Make

• alt-j and alt-n behave like alt-down and
• alt-k and alt-p like alt-up.

j and k are the down/up arrow keys in Vim, pagers like less, Google Calendar, and many other programs. n and p (for next and previous) are also used as shortcuts in many programs.

Would you accept a PR for this?

It would be great to just press alt-{j,j,enter}.

Notes

I also thought about different solutions that don't require to hold the alt key or press the arrow keys. But I came to the result, that it's already pretty good as it is. alt is a nice mnemonic for "alternative action".

• alt-tab is reserved on most desktops.
• For ctrl-tab I have to move my hands.
• Pressing alt to toggle the visibility of the alternative action list is another idea.
• alt-{1..n} to directly select an alternative action...

Everything else I can think of is probably less intuitive.

The issue does not identify a file, test, or entry point. Start by locating keyboard handling for alternative-action selection in the Qt Widgets frontend, then verify that Alt-J/Alt-N select the same action as Alt-Down and Alt-K/Alt-P as Alt-Up, including the existing Enter flow.