XWIKI-14159: Add support for replacing an existing attachment when uploading a file with the Attachment Selector
* Disable the rename feature when the user deletes the selected attachment.

XWIKI-14160: Add support for specifying the version summary when uploading a file with the Attachment Selector
XWIKI-14159: Add support for replacing an existing attachment when uploading a file with the Attachment Selector

* Use a mix of server side and client side image resizing in order to reduce the page loading time while keeping a good image quality.