Use data-reset-on-edit attribute to reset other inputs
when editing input with data.
Do not unbind event (old code unbound it after one use for
no reason)
PHPBB3-11795
In the remote avatar and gravatar the dimension input boxes will now be
cleared when changing the avatar. This will only happen once per
page-load. Any input after the first change will not trigger this.
PHPBB3-10018