chatview: some links have no previews

@atraczyk this is "fun"

generated HTML is <a href=\n\"https://www.youtube.com/watch?v=6TwpEtaMKCo\">https://www.youtube.com/watch?v=6TwpEtaMKCo</a>\n

In messageparser.cpp, replacing the regex by: static QRegularExpression hrefRegex("href=\n*\"(.*?)\""); works, but I don't understand why a \n is there

added SprintTo review UI/UX labels

closed

removed SprintTo review label

mentioned in commit 61126cfa