Live Update: refresh if resource changes

[timbl]

See https://matrix.to/#/!wAfwwonbRnRLYejFOR%3Agitter.im/%24OOIYSVu1hwO7cX5ivRSO7ISkGi8ht5f8ceGQMtTMN-o

If the web resource changes, and the local copy it is not edited, then reload the page