DDF-925 Add spinner to refresh button.
* Refresh button now spins for duration of refresh operation or for 2 seconds, whichever is longer.
Merge branch 'rebase/DDF-925' of http://github.com/jeremyglasser/ddf-catalog into jeremyglasser-rebase/DDF-925

Conflicts:
	admin/module/catalog-admin-module-sources/src/main/webapp/js/view/Source.view.js
Merge branch 'rebase/DDF-925' of http://github.com/jeremyglasser/ddf-catalog

Conflicts:
	admin/module/catalog-admin-module-sources/src/main/webapp/js/view/Source.view.js
Merge branch 'jeremyglasser-rebase/DDF-925'