FIX: correctly load drafts based of id

Previously we relied on race conditions to correctly open a draft, so this
broke.

New code is deliberate.

Also corrects missing observers on composer action

app/assets/javascripts/discourse/models/composer.js

@@ -744,9 +744,12 @@ const Composer = RestModel.extend({
 
     if (opts.postId) {
       promise = promise.then(() =>
-        this.store
-          .find("post", opts.postId)
-          .then(post => composer.setProperties({ post }))
+        this.store.find("post", opts.postId).then(post => {
+          composer.set("post", post);
+          if (post) {
+            composer.set("topic", post.topic);
+          }
+        })
       );
     }
 
@@ -765,7 +768,9 @@ const Composer = RestModel.extend({
         this.store.find("post", opts.post.id).then(post => {
           composer.setProperties({
             reply: post.raw,
-            originalText: post.raw
+            originalText: post.raw,
+            post: post,
+            topic: post.topic
           });
 
           composer.appEvents.trigger("composer:reply-reloaded", composer);

app/assets/javascripts/discourse/templates/components/composer-action-title.hbs

@@ -9,6 +9,8 @@
     closeComposer=closeComposer
     action=model.action
     tabindex=tabindex
+    topic=model.topic
+    post=model.post
   }}
 {{/if}}
 

app/assets/javascripts/select-kit/components/composer-actions.js

@@ -39,21 +39,17 @@ export default DropdownSelectBoxComponent.extend({
 
     // if we change topic we want to change both snapshots
     if (
-      this.get("composerModel.topic") &&
-      (!_topicSnapshot ||
-        this.get("composerModel.topic.id") !== _topicSnapshot.id)
+      this.topic &&
+      (!_topicSnapshot || this.topic.id !== _topicSnapshot.id)
     ) {
-      _topicSnapshot = this.get("composerModel.topic");
-      _postSnapshot = this.get("composerModel.post");
+      _topicSnapshot = this.topic;
+      _postSnapshot = this.post;
       this.contentChanged();
     }
 
     // if we hit reply on a different post we want to change postSnapshot
-    if (
-      this.get("composerModel.post") &&
-      (!_postSnapshot || this.get("composerModel.post.id") !== _postSnapshot.id)
-    ) {
-      _postSnapshot = this.get("composerModel.post");
+    if (this.post && (!_postSnapshot || this.post.id !== _postSnapshot.id)) {
+      _postSnapshot = this.post;
       this.contentChanged();
     }