Standardize the integration hook "_modify_" settings

This standardizes the hook location in the controllers to  allow for addons to be included in admin search

It adds in a few missing admin settings areas that did not have hooks

Update so all follow the "_modify_"  and "_save_"  naming patterns.  Some may have been left over from SMF (an more likely 2.1), but its more important that we be consistent for things like this.  Its unlikely any mods use them and if they were added in 2.1 even less.