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added 30 characters in body
Martin Sleziak
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It seems the chat link is still there, but now it is on the right - as shown in this screenshot:

Screenshot

Maybe somebody who knows more about this will give you a more detailed response. (Or somebody who has some spare time at their hands and is willing to read through the discussions and the announcements concerning this change.)

But probably these posts might be a good start:

Martin Sleziak
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