Sup sub tweak and balanceTags relogic

Essentially I just set nest_su_maxdepth to 1 in the vars table and told balanceTags we want to default to only one level deep of tag nesting (meaning no nesting) if no other value is passed from the call or the vars entry for some reason does not exist. Previously it defaulted to no limit which is going to be what we want far less often than eliminating nesting.

At the moment sup/sub nesting is going to default every time because none of the calls pass in a value for it. I should go back and change every bloody call but it's Sunday and I'm technically not supposed to be doing this much, so it can either stay defaulting or wait until tomorrow.