[fix] Do not show a 'pad deleted' message when pad is copied#3185

lpagliari wants to merge 1 commit intoether:developether/etherpad:developfrom

storytouch:fix_3183/do_not_show_pad_deleted_when_pad_is_copiedstorytouch/etherpad-lite:fix_3183/do_not_show_pad_deleted_when_pad_is_copiedCopy head branch name to clipboard