Since the server doesn't support sorting, use client side sort directly
instead of calling reload() first.

Whenever a folder has a "data-share-owner" attribute, the icon is now
properly updated to a shared folder icon.

* ref comment: https://github.com/owncloud/core/issues/10392#issuecomment-52050567

When uploading multiple files from the web interface, compare the PHP
upload limit against the largest file, not against the sum of all files.