2 small fixes

* Turn off singleRun karma:server
Currently, `karma:server` runs the unit tests and exits. I assume the wanted behavior is that it would stay on and, watch the source files for changes and re-run the tests (because its autoWatch flag is on). The first commit fixes this.

* Trigger focus correctly in timepicker tests
When I ran the tests under Chrome, one test failed (it passes under PhantomJS though). The second commit makes it pass under Chrome as well.