Support return key for next result

[willrstern]

The behavior for most search apps (Chrome, iTerm, etc) is:

While focused on the search input:

• return highlights/goes-to the next result
• shift+return highlights/goes-to the previous result

Allowing the user to hit return, return, return, to cycle through all available results easily.

This would be a nice feature, or at least nice to be able to configure

[jaanauati]

pull request merged and stuff published, closing out this ticket. thanks.