feat(chat): Add Open chat button to chat notifications

lang/main.json

@@ -865,6 +865,7 @@
         "oldElectronClientDescription1": "You appear to be using an old version of the Jitsi Meet client which has known security vulnerabilities. Please make sure you update to our ",
         "oldElectronClientDescription2": "latest build",
         "oldElectronClientDescription3": " now!",
+        "openChat": "Open chat",
         "participantWantsToJoin": "Wants to join the meeting",
         "participantsWantToJoin": "Want to join the meeting",
         "passwordRemovedRemotely": "$t(lockRoomPasswordUppercase) removed by another participant",

react/features/chat/actions.native.ts

@@ -1,6 +1,5 @@
 import { IParticipant } from '../base/participants/types';
-import { navigate }
-    from '../mobile/navigation/components/conference/ConferenceNavigationContainerRef';
+import { navigate } from '../mobile/navigation/components/conference/ConferenceNavigationContainerRef';
 import { screen } from '../mobile/navigation/routes';
 
 import { OPEN_CHAT } from './actionTypes';
@@ -18,7 +17,7 @@ export * from './actions.any';
  *     type: OPEN_CHAT
  * }}
  */
-export function openChat(participant: IParticipant | undefined | Object, disablePolls?: boolean) {
+export function openChat(participant?: IParticipant | undefined | Object, disablePolls?: boolean) {
     if (disablePolls) {
         navigate(screen.conference.chat);
     }

react/features/chat/middleware.ts

@@ -51,8 +51,9 @@ import {
     clearMessages,
     closeChat,
     notifyPrivateRecipientsChanged,
+    openChat,
     setPrivateMessageRecipient
-} from './actions.any';
+} from './actions';
 import { ChatPrivacyDialog } from './components';
 import {
     ChatTabs,
@@ -633,7 +634,9 @@ function _handleReceivedMessage({ dispatch, getState }: IStore,
     if (shouldShowNotification) {
         dispatch(showMessageNotification({
             title: notificationDisplayName,
-            description: message
+            description: message,
+            customActionNameKey: [ 'notify.openChat' ],
+            customActionHandler: [ () => dispatch(openChat()) ]
         }, NOTIFICATION_TIMEOUT_TYPE.MEDIUM));
     }