Renders form canvas if conditions are met.
File: src/db-objects/forms/form-edit-page-handler.php
Form_Edit_Page_Handler::add_field()
Adds a field to the edit page.
Form_Edit_Page_Handler::add_tab()
Adds a tab to the edit page.
Form_Edit_Page_Handler::add_meta_box()
Adds a meta box to the edit page.
Form_Edit_Page_Handler::__construct()
Constructor.