New: Unfocus searchbox after loading

Some people (like me) are using vimperator and the autofocus grabs to
focus so that we cannot use keys to control vimperator anymore. I'm not
sure if some people like the autofocus to start searching immediately
after visiting osm.org.
Merge branch 'nofocus' of https://github.com/SammysHP/osm-clean-ui into SammysHP-nofocus

Conflicts:
	17415.user.js