Fix browser notification permission request logic (#13543)

* Add notification permission handling code

* Request notification permission when enabling any notification setting

* Add badge to notification settings when permissions insufficient

* Disable alerts by default, requesting permission and enable them on onboarding

app/javascript/mastodon/reducers/notifications.js

@@ -10,6 +10,8 @@ import {
   NOTIFICATIONS_MOUNT,
   NOTIFICATIONS_UNMOUNT,
   NOTIFICATIONS_MARK_AS_READ,
+  NOTIFICATIONS_SET_BROWSER_SUPPORT,
+  NOTIFICATIONS_SET_BROWSER_PERMISSION,
 } from '../actions/notifications';
 import {
   ACCOUNT_BLOCK_SUCCESS,
@@ -40,6 +42,8 @@ const initialState = ImmutableMap({
   readMarkerId: '0',
   isTabVisible: true,
   isLoading: false,
+  browserSupport: false,
+  browserPermission: 'default',
 });
 
 const notificationToMap = notification => ImmutableMap({
@@ -242,6 +246,10 @@ export default function notifications(state = initialState, action) {
   case NOTIFICATIONS_MARK_AS_READ:
     const lastNotification = state.get('items').find(item => item !== null);
     return lastNotification ? recountUnread(state, lastNotification.get('id')) : state;
+  case NOTIFICATIONS_SET_BROWSER_SUPPORT:
+    return state.set('browserSupport', action.value);
+  case NOTIFICATIONS_SET_BROWSER_PERMISSION:
+    return state.set('browserPermission', action.value);
   default:
     return state;
   }

app/javascript/mastodon/reducers/settings.js

@@ -29,12 +29,12 @@ const initialState = ImmutableMap({
 
   notifications: ImmutableMap({
     alerts: ImmutableMap({
-      follow: true,
+      follow: false,
       follow_request: false,
-      favourite: true,
-      reblog: true,
-      mention: true,
-      poll: true,
+      favourite: false,
+      reblog: false,
+      mention: false,
+      poll: false,
     }),
 
     quickFilter: ImmutableMap({