[FIX] mail: fix wrong adjustment in the chat window 
[FIX] mail: fix wrong adjustment in the chat window 

In the chat, there is an indication of when a message was sent,  This indication gets updated as time passes. When the last one in the conversation is updated to an indication that takes more space (e.g. from 'now' to 'a minute ago'), the text below is pushed lower (as expected) but the chatter does not scroll down. As a result, we do not see new messages, unless manually scrolling down.
(PR #17469)

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