3910 Change heading and button text on wrangling pages

https://code.google.com/p/otwarchive/issues/detail?id=3910

1. The "edit tag and parent associations" link text should now say "Edit [TAG_TYPE, e.g. Fandom] Tag & Associations" to make it clearer what it does. Here, TAG_TYPE refers to the type of the tag you are currently viewing, e.g. if I am looking at the page for wrangling Supernatural character tags, it should say "Edit Fandom Tag & Associations."
2. The heading "Showing [STATUS, e.g. canonical] [TAG_TYPE, e.g. characters]" should now say "Showing [STATUS, e.g. Canonical] [TAG_TYPE, e.g. Character] Tags"