* Fix AND prefix on rule form
This new condition prefix data target is used to ensure the AND prefix is added/removed to additional conditions/groups when there aren't any saved conditions yet.
* Ensure the condition group "Add condition" button is type button to avoid form submission
* Add prefix update when removing a subcondition
* Use data condition to update the prefix on conditions, condition groups, and subconditions
* Use condition remove instead of element remove for condition groups so prefix logic runs
* Add back explicit show_prefixes to ensure subconditions never have a prefix
* Run the prefix update runs on a load of a form, which handles prefixes on an edit since no conditions change
* Ensure saved items that are marked for removal don't impact the index
* Simplify logic since we don't process subconditions
* Clean up comments
* Add primary_condition_title field to rule model
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