Merge pull request #11052 from ian-liu/email/Bug891641_Browser_links_in_received_emails_are_unselectable_if_file_attachments_are_present

Bug 891641 - [B2G] [Leo] [Email] Browser links in received emails are unselectable if file attachments are present, r=@asutherland (cherry picked from commit afde38e7be5455d5d634c58a60a4d8009e0e7034)