implement keytoken list and all-messages list

flutter/lib/pages/message_view/message_view.dart

@@ -162,7 +162,9 @@ class _MessageViewPageState extends State<MessageViewPage> {
               icon: FontAwesomeIcons.solidGearCode,
               title: 'KeyToken',
               values: [message.usedKeyID, token?.name ?? '...'],
-              mainAction: () => {/*TODO*/},
+              mainAction: () => {
+                Navi.push(context, () => FilteredMessageViewPage(title: token?.name ?? message.usedKeyID, filter: MessageFilter(usedKeys: [message.usedKeyID])))
+              },
             ),
             UI.metaCard(
               context: context,