We want to update message.submessages for new events, even
though our couple of widgets (poll/tictactoe) that can process
"update" events currently just apply events as "deltas"
to their current data.
This does fix a subtle issue where you may get incoming
events for a message that the client knows about but which
it hasn't yet activated as a widget. Up until now,
we've rarely seen the bug that's fixed here, since it's
usually the case that as soon as we receive a message, we
widgetize it right away.
The user can now specify the value while creating a stream.
An admin can later change it via `Change stream permissions`
modal. Add is_announcement_only to subscription type text.
For some reason in my original version I was sending both
content and data to the client for submessage events,
where data === JSON.parse(content). There's no reason
to not just let the client parse it, since the client
already does it for data that comes on the original
message, and since we might eventually have non-JSON
payloads.
The server still continues to validate that the payload
is JSON, and the client will blueslip if the server
regressses and sends bad JSON for some reason.
While there are legitimate use cases for embedded Zulip in an iFrame,
they're rare, and it's more important to prevent this category of
attack by default.
Sysadmins can switch this to a whitelist when they want to use frames.
With this commit, we change how we deal with translation for strings.
Previously we used to fetch the translations data after loading which
created a lot of unpleasant race bugs.
So we changed this to use the `translation_data` sent in `page_params`
which is available at load time. The previous fetching can be useful if
we want to change the string to the changed language without reloading
the page but since we ask the user to reload the page after changing
the default language so fetching after loading isn't useful for us and
hence we can add resource only once.
Ultimately, we can remove the i18next plugins too. We leave the logic
for clearing local storage, patched to fully clear it.
Fixes: #9087.
We now have a simple algorithm: First, look at the URL path
(e.g. /de/, which is intended to be an override). Second, look at the
language the user has specified in their settings.