Readme corrections
Added page ID indicator in Page Quick Edit modal
Add Child Page(s) form created, JS functionality added to hide/show/add additional pages in form
Small bug fixes in new child form.
Added sorting to new page fields.
New child page form AJAX submission written
New child form submit button class updated.
Form handler registered to save child pages
Backend page creation handling - form handler, page factory created. Repo method added, validation method added.
Menu sync added to new page handler
Added edit link to returned new page data.
Additional localized strings added to nested pages JS object.
JS functionality for adding new page.
Added new page count to submit button.