Feature: make alternate menu like in mc

[benapetr]

Currently there is only 1 menu, which is full. It would be nice if by holding ctrl or such you could switch to another menu that would offer other stuff that doesn't fit into current 12 function keys.

For example it would be cool if ctrl + left / right arrow would quickly let you switch the column by which the list is sorted so that you could very quickly switch the view's and simply change if you want sort processes by memory, or IO etc, that is something I am really missing now (having to switch the columns by accessing the preferences is just slow)