Save state for unpublished comments

[lsabor]

user exmateriae requests:

Some kind of save state for the comments being drafted? Nothing worse than writing a long comment and see it disappear in the ether.

[aseckin]

We need:

• something to indicate the saving that's going on as users write a comment
• a way to continue from the saved state or start over the next time they come back to the page

Assigning to myself

[SylvainChevalier]

@aseckin not high priority. This is annoying but not critical.

[aseckin]

Just discussed and decided we don't need UI changes for this. Expected behavior:

• User's comments are saved every x second
• This applies to both top-level comments and replies, so multiple drafts can exist on a single page
• Upon attempting to leave the page, user does not see any warning messages, they can just leave
• When they come back to the same page, the comments box(es) are prefilled with the saved data

Exact frequency the saves happen, and the method (cookies?) is TBD by eng

[brunoparga]

This is probably covered in "no UI changes", but: no need to provide a way for the user to start their comment from scratch. From our (users') point of view, it is trivial to just select the pre-populated text and delete it.