Perform a case insensitive search through the current menu. Jump to the
first item matching all keys in the current search. Backspace can clear
the current search, and the search will timeout after 3 seconds.
The menu manager will now send events directly to the current menu.
Previously if a menu was opened it would always be set as the current
menu. Now when opening a menu you can optionally say that you do not
want to have it as the current menu.
One scenerio when this happens is when a menu is popped up as part of a
preview, for example, when hovering over a menu item that is a submenu.
Sending the event to the current menu simplifies things and solves a few
inconsistencies in bevhaviour (such as hovering over a submenu, but key
events not being sent to the submenu).
When the user opens a context menu by right-clicking on something,
we now immediately stop sending mouse events to whoever was doing
active input window tracking before.
There are probably more situations where we should do this, and maybe
there's also a more generic way to express it, but this works for now.
It didn't feel right to have a "DHCPClient" in a "Servers" directory.
Rename this to Services to better reflect the type of programs we'll
be putting in there.
