Improving keyboard friendliness

Hello,

I would like to suggest that Opensnitch should be more keyboard friendly. As it is, it is possible to use the keyboard to take actions, but it's a bit cubersome to do so. So, my suggestion is the following:

1. Improve coloring/contrast of the selected button (As it is, it's hard to see if it's the "Allow" or "Deny" that's selected.

2. Move the "Take this action" dropdown to buttons; Instead of having a dropdown with "Once", "Until quit" and "Forever", I would suggest having them side by side, all visible at the same time;

3. Bind keys to all the options; For example, the numbers "1,2,3" could be shortcuts to "Once", "Until quit" and "Forever", respectively. The "w", "b", "d" and "a" could be shortcuts to "Whitelist app", "block app", "deny" and "allow", respectiviely.

Sorry if this is cherry-picking and I know there's much more important stuff to do, but I believe this could improve Opensnitch.