Remove conversation from left pane on 'delete messages' (#1807)
'Reset session' option for a conversation now resolves more error situations (#1796)
Import: Link to export docs, make clear that import should only happen once (#1803)
Remove last seen indicator if we sent a message in this conversation on another device (#1805)
New version dialog (OSX and Windows) should now be less obtrusive (#1795)
About dialog can be dismissed with escape key, important on some Linux window managers with minimal chrome (#1795)
Dev: