4035 Improve tooltips for nominated tags

https://code.google.com/p/otwarchive/issues/detail?id=4035

We had a method for applying classes and tooltips to tags in nominations based on the tag's wrangled state, but we weren't actually using the method. Instead, we were using a less comprehensive version of the code in a view file.

The note about "#BACK END, I attempted to put titles in but it's rendering as oldtitle" is regarding the title attribute. The plugin we use for the tooltips turns the title attribute into a made-up attribute called "oldtitle" so native browser tooltips don't interfere with the fancy JavaScript tooltips, so this is expected behavior.