Organize tag dependencies with inheritance

[csauve]

In the tag template, dependencies are listed in full for each tag as a section of the "metabox". For some tags like weapon this list becomes full of dependencies from tag superclasses like item and object, making it less clear what the immediate dependencies are. The dependencies list is meant to help show what tags are related to the one the user's currently viewing. Organizing the list by inheritance would clarify what dependencies are highly specific to the current tag.

CoS:

• The dependency list is broken into sections by which level of inheritance the dependency came from
• Tags remain sorted by ascending name within each inheritance level
• Direct dependencies order first, followed by ascending inheritance level (e.g. Vehicle, Unit, Object)

Constraints:

• Additional metabox features (e.g. expand/collapse) are a non-goal of this ticket