This is really a few separate but related issues, though I expect anyone who'd fix one of these issues could fix all of them: * The S/MIME icons waste too much vertical space. We end up losing approximately 1 line of text due to it. We should use the smaller icons instead (this is technically a mail issue, not mailnews, since it's defined in mail/themes/). * Right-clicking the S/MIME icon opens the context menu for the header, then immediately closes it and opens the S/MIME dialog. It should probably just open the context menu. * The S/MIME icons should have tooltips describing their status * The S/MIME dialog should be a doorhanger (or more technically, a XUL <arrowbox>, like Larry in Firefox).
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