It would help so much if you could edit the web pages in a folder.
It is a shame that the "Edit Web Pages" function is about useless and the web themes too because the editor can not edit any pages not in the root of the site. If you could take the code you have for the file manager and put it with the "Edit Web Pages". Then we could edit a file in public_html/birthdayparty/indx.html on the website. That would give that section really big help and make it useful again,