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.
The instances of "archive" throughout this file should probably be capitalised (while we're at it)