minor tweak: context-menu not appearing upon key-press

Hi folks,

the context-menu-key (windows keyboards) is not working. Shift-F10 will do, but the key that had been introduced with those windows-boards doesn't.

BTW - is there any place within the OH that will cover keyboard-shortcuts? I.e. - I can't get to the treeview or listview by keyboard as soon as there's at least two windows (local/FTP). Ctrl-Tab will switch between windows, but then the keyboard won't accept any other input, and no control will have the focus ...