Fixes for filters not defined in Pod but are in PodsUI::$fields[ 'manage' ]; Implementing PodsForm::submit_button so submit_button() can be used on backend/frontend in PodsUI; Added 'pods_ui_default_action' hook (defaults to 'edit') for which action to use in main column link if both edit/view are available
Fixes for @pglewis todo notes; Switching PodsObject_Pod handling for post type / taxonomy / comment types to _post_type_*, _taxonomy_*, _comment_* instead of post_type_*, etc to avoid accidental internal calls, mainly for comment types
Fixes #1788