This commit includes a new `stream_post_policy` setting,
by replacing the `is_announcement_only` field from the Stream model,
which is done by mirroring the structure of the existing
`create_stream_policy`.
It includes the necessary schema and database migrations to migrate
the is_announcement_only boolean field to stream_post_policy,
a smallPositiveInteger field similar to many other settings.
This change is done to allow organization administrators to restrict
new members from creating and posting to a stream. However, this does
not affect admins who are new members.
With many tweaks by tabbott to documentation under /help, etc.
Fixes#13616.
Earlier, on narrowing the window to some particular sizes,
long stream names used to overlap with the subscribe and view stream
buttons.
The issue was resolved by cutting the stream name short and putting
ellipses at the end. A title was provided to the stream name div so that
the entire stream name would be visible on hovering over it.
Fixes: #13139
In templates we determine checkboxes are disabled by using the following
`if` clause,
```
{{#if (or (and is_muted notification_setting) realm_setting_disabled)}}
disabled="disabled"
{{/if}}
```
and it is more intuitive to do such calculation in javascript code, so we
added an `if_disabled` attribute in `settings` context which replaces
logical operations from `if` statement.
So for non-notification settings, it is
```
is_disabled: check_realm_setting[setting]
```
where check_realm_setting[setting] is same as realm_setting_disabled.
and for notifiaction settings it is,
```
ret.is_disabled = check_realm_setting[setting] || sub.is_muted;
```
Fixes#13134 as the last commit in the series for this issue.
Solves the "The (?) should just be a target=_blank link to
/help/message-a-stream-by-email." part of the issue.
As a result, a bunch code managing the email hint popup can be deleted,
together with a node test for that.
Ryan Rehman
Vaibhav Raj Singh
Pragati Agrawal
Tim Abbott
Mateusz Mandera
Anders Kaseorg