>>BTW, what do you think about my other idea - simply have a button under the message to allow insertion of a link with a title - it should solve complex URL problem.
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>Not really that helpful - it's extra operation for the user. Better solve the problem of recognizing a url in the first place

I think it's helpful. Say, many times I want to post a description for URL, not a link. In this case I manually adjust the message.