- Bumped version 0.3.4 -> 0.4.0
- Updated RESTian version in composer.json to v0.3.1
- With Sidecar_Plugin_Base
-- Replaced $current_page and $current_form with $_current_admin_page and $_current_form.
-- Added set_current_admin_page(), set_current_admin_page(), set_current_form() and set_current_form().
-- Deleted the remove_filter() in pre_update_option() because it broke same filters in the child plugin.
-- Change pre_update_option() to only transfrom the value when $new_value['state'] to avoid issues with being called again on shutdown.
- Added a plugin on exist filter method to the return for Sidecar_Admin_Page->filter_postback().