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Replace single click with double click on user's email address to open the details window; if the action was performed from a live chat window, the default opened tab should be previous chats (same behavior for emails). As a solution, it can be solved either by:
1. insert a copy button next to user email address, which will copy the email address by a single mouse click
2. insert a blank space before and after the email address (e.g. "( firstname.lastname@example.org )"