Fixed menu items that didn't match node names.

I'm not convinced this we will want this in the end, but let's get it in artist hands before we make that call.
Improved sorting for search results.

Sorting first on match position, then alphabetically. Up for debate I suppose, but let's get it in users hands first.
Limiting to 50 search results, displaying the rest on a submenu.
Fixed re-display bug by preventing popup of empty search results