[FIX] mail: notify other tabs on document thread message post

Before this commit, most new messages added to the mail manager were
handled as if recently posted from a document thread. As a result, it
was frequently setting a new item in the local storage to notify
other tabs from these new messages.

The intent of this behaviour is to notify other tabs of newly posted
messages in a document thread, without using a longpolling
notification. That means this logic should only apply on messages
that have been recently posted on a document thread.

Sometimes, this issue was breaking the local storage on Firefox.
It showed the error message "Quota Exceeded Error" whenever `setItem`
was used, even when items were removed beforehand. The capacity of
the storage was only a few Kbs on this domain, far from reaching the
maximum capacity. We think that this error comes from the concurrent
`setItem` on multiple tabs, but this is very hard to reproduce.

This commit fixes the issue by limiting the `setItem` to the tab
that really posted the message. Tests have been adapted in order to
pass only with this fix.

0 files changed, 0 insertions, 0 deletions