This fixes missing translation tags in our missed-message emails,
which is surely the most user-facing part of the production that
wasn't internationalized.
Fixes: #14398
Making sender name go in-line with message body only if
the html starts with <p> tag since it won't look good
if the message starts with a code snippet, ul, etc.
If message starts with p tag we can safely assume that
it can go in-line with sender name.
This is a dramatic redesign of the look and feel of our missed-message
emails, designed to decrease the feeling of clutter and just provide
the content users care about in a clear, visible fashion.
This cleans up the reply_warning feature in favor of a more coherent
explanation of whether or not one can reply.
(Also, critically, it now advertises the ability to enable
missed-message email replies with some administrative configuration
work.)
Refactoring in 4e1c058 was not correct since recipient_block
and message_content checked for if not condition while
recipient_header checked for if.
The naming of classes in 6077a33 was also not correct
semantically.
As part of this change, we port into the .messages class the work in
4e8e7348da to change overflow-y to auto,
not scroll (skipping that would result in a regression).
vaibhavrajsingh2001
Vishnu KS
Rishi Gupta
Mateusz Mandera