Refresh the newsfeed page

[grep0]

In web interface, he link to the newsfeed page currently contains a timestamp like
https://web.moera.org/@someone/someone.moera.blog/news?before=<timestamp>,
and there is no obvious way to refresh to the newest feed other than manually editing the URL.
Even worse, if you navigate away e.g. to your timeline, the timestamp remains.

I suggest to add "refresh" button, and also automatically refresh the news feed page when the user clicks on "news feed" icon