Would really like to customise the Topbar/Top Menu/Toolbar (to the right of Snooze, Archive, Trash). In Preferences » Appearance there are so many customisation options, including for the Left Sidebar and Right Sidebar. There is so much empty space at the Top, feels like an obvious thing to add. :) Use cases: We use links back to Missive threads a lot, would save time to Copy link from an icon. We'd also like to add Star and Label As to the Topbar.