[Feature request] Provide option to require that (sub)menus be clicked, not hovered

[summersab]

The new menu is awesome, but one thing that can become frustrating with menus like this is that mouse control has to be very precise. If you accidentally hover just a little too far above or below a section, that section is selected.

Some users may prefer to actively click the (sub)menu sections in order to activate them. For example, in the "Apps" section, hovering over any AppVM will switch to that VM's launchers. However, you have to actually click to switch between the Apps, Templates, and Service sections. It would be nice to have an option that requires the AppVM menu sections to work the same way.