need keyboard shortcuts when mapping Controls

[pocococo]

On the 'Controls' page, I'd like to be able to navigate with down/up/left/right arrow keys rather than having to click each binding with the mouse, and to clear bindings with a keyboard key (like Delete) rather than having to clicking the Clear button.

 

This would make it much faster to undo the default, unused bindings when I were setting up my controller.

 

For example, I would go to Ka-50 Sim and then Ins Cyclic Stick. I would then be able to arrow-key around all the key bindings for all of my controllers, pressing Delete on each one that I didn't want set, and then proceed to set up the bindings that I wanted.

 

Would also be nice to be able to press Enter on a binding to *add* an assignment. This would make it much quicker to get all my controller bindings set up.