This is better than text/plain, in particular since it preserves list items.

Closes #13810113.

_cw.ajax_replace_url() is Evil™

Added tag cubicweb-comment-version-1.11.1, cubicweb-comment-debian-version-1.11.1-1, cubicweb-comment-centos-version-1.11.1-1 for changeset be8de6e87b4c

Added tag cubicweb-comment-version-1.11.0, cubicweb-comment-debian-version-1.11.0-1, cubicweb-comment-centos-version-1.11.0-1 for changeset 1073e252d50e

It's a bootstrap style, but it's harmless without bootstrap.

- use pictograms for reply/edit/delete comment actions
- move edit/delete actions to the right (since these are used very often)
- make the comment "area" identifiable (top+left border)
- reduce "indentation" of sub-comments (less space-consuming)

cubicweb.web.uicfg is now cubicweb.web.views.uicfg.

Added tag cubicweb-comment-version-1.10.0, cubicweb-comment-debian-version-1.10.0-1 for changeset d371c0bad385

The fix that sanitizes html output from db fields has a little side effect.

Added tag cubicweb-comment-version-1.9.1, cubicweb-comment-debian-version-1.9.1-1 for changeset a7b5b2429099