Counting unique unwrangled tag uses

There are a lot of whitespace changes too, because I'm a bit compulsive about spacing standards, but the main actual change is a bunch of .uniq for the unwrangled by_type counts.
Merge branch 'refs/heads/master' into issue-2272-wrangling-home-counts

Conflicts:
	app/views/tag_wranglers/show.html.erb
Merge branch 'refs/heads/master' into issue-2272-wrangling-home-counts
Merge branch 'refs/heads/master' into issue-2272-wrangling-home-counts
Merge branch 'refs/heads/master' into issue-2272-wrangling-home-counts
Obliviate ALL the tabs
Merge branch 'refs/heads/master' into issue-2272-wrangling-home-counts
Merge pull request #1215 from CristinaRO/issue-2272-wrangling-home-counts

Counting unique unwrangled tag uses