chore(jshint): update grunt-contrib-jshint
refactor(jshint): reduce duplication & test all JS files
fix(select): auto-select new option that is marked as selected
When adding a new <option> element, if the DOM of this option element
states that the element is marked as `selected`, then select the new
<option> element

Closes #6828
chore(e2e): update protractor to 1.0.0-rc4

This change contains a stability improvement to use data URLs instead of
about:blank for resetting the URL.
chore(tests): fix warning about a non-unique element locator in e2e tests