Askbot unseen posts by DaveRo

This addon was originally called Jolla Askbot unseen posts. The Jolla askbot site is now obsolete.

Highlights unseen posts on askbot sites.
It will run with no extra configuration on https://ask.libreoffice.org/en/questions
but works on other askbot sites (or languages) that you specify.

On a question page:
- comments are expanded so all are displayed.
- the date on the highest post on the page (answer, update, comment) is stored.
- the dates of previously unseen posts are coloured red.
- previously seen posts are green.
- it scrolls to the first unseen post on the page.

On the questions list page the activity date is coloured:
- black: the question has not previously been viewed - nothing stored for the question.
- red: there is an unseen post - date later than stored.
- green: there are no unseen posts.

Colours can be changed in the preferences.