Slightly more vim-like ProcSearch

[gitgoggles]

Currently, after pressing '/' to perform ProcSearch, you have to press 'Esc' to accept the search pattern and leave the search field entry box. I'd like 'Enter' to also be an option for doing this, to make it behave more like vim's '/' search (to satisfy my muscle memory). I'd be happy to create a pull request.

Let me know if this is something you'd be ok with.