[FIX] mail: notif manager positions date + check

By default in the notification manager we see something like:

```
record name     {a second ago}
summary                      V
```

but if for example the record name is long or the summary empty, we can
have something like:

```
record name so very long {a s}
V
---
record name so very very lo...
                             V
```

This is because the record name was not allowed to grow, and the
positionning of the check mark based itself on the existence of the
summary container (.o_last_message_preview).

With this change the date a message was sent is shown in any case and
the check mark is on the right.

opw-1911654
closes #28960

0 files changed, 0 insertions, 0 deletions