Previously, we showed an empty message banner if the user tried
to send an empty message. We only showed it for users with
"ctrl+enter to send" because we thought it might be easy for a
user to press just enter accidentally.
However, this missed the case where the user clicks on the Enter
button. We want to show the user something in this case to tell
them that they're missing message content.
To avoid more complicated logic, this PR removes the banner
completely and changes the compose box border to red if the
user tries to send an empty message (for all cases).
The red line goes away as soon as the composebox has non-whitespace
characters.
Previously notifications.clear_compose_notifications was used accross
the codebase. Since introducing the new
compose_banner.clear_message_sent_banners function, the two functions
are similar enough that we can just use clear_message_sent_banners
everywhere. This commit also moves scroll_to_message_banner_message_id
to compose_banner.
Instead of removing all compose banners, we now remove only warnings
and errors -- this makes no difference right now, but this change
will allow us to add other compose banners that are cleared at
different times.
evykassirer