SideBySide2: Bind Ctrl-F for search

Users are unable to relearn to use / to search in the page and keep
trying to activate the browser's native search with Ctrl-F. Rebind
Ctrl-F as vim search, and drop Ctrl-B as a binding.

Also drop Ctrl-R as a binding allowing the UI to be reloaded for
quicker debugging.

Change-Id: I8d803749a160b8ed937ae8e16964547a1c1ef728
5 files changed