Moving most in-page Javascript to a separate file.

This includes most of the JS that runs after the page has loaded.
Removing test code that blocks JS features using query-string.
Correct Javascript issues

Merge remote-tracking branch 'origin/jima-accessibility-sweep' into merge-staging

Conflicts:
	dspace/modules/xmlui/src/main/webapp/themes/Mirage/lib/xsl/core/page-structure.xsl