Add notifications when a reblogged status has been updated (#17404)

* Add notifications when a reblogged status has been updated

* Change wording to say "edit" instead of "update" and add missing controls

* Replace previous update notifications with the most up-to-date one

app/javascript/mastodon/reducers/settings.js

@@ -36,6 +36,7 @@ const initialState = ImmutableMap({
       mention: false,
       poll: false,
       status: false,
+      update: false,
     }),
 
     quickFilter: ImmutableMap({
@@ -55,6 +56,7 @@ const initialState = ImmutableMap({
       mention: true,
       poll: true,
       status: true,
+      update: true,
     }),
 
     sounds: ImmutableMap({
@@ -65,6 +67,7 @@ const initialState = ImmutableMap({
       mention: true,
       poll: true,
       status: true,
+      update: true,
     }),
   }),