* util: pipe standard error of the editor
Some editors (e.g. vis) use standard error instead of standard output
for drawing the UI.
* feed: clean-up post visibility
Also fixes inconsistent colors of users depending whether they
do or don't have a display name.
* feed: hide visibility of public posts
* add option to reverse files
* list favorited
* update version
Co-authored-by: Alexey Yerin <yyp@disroot.org>