Move instances of Client.createPost() in components to an action (#4639)

* Move instances of Client.createPost() in components to an action

* update per review, waiting for more review and see if this is the right way

* update per code review

* update code

* remove comment per request

webapp/components/create_post.jsx

@@ -11,7 +11,6 @@ import TutorialTip from './tutorial/tutorial_tip.jsx';
 
 import AppDispatcher from 'dispatcher/app_dispatcher.jsx';
 import * as GlobalActions from 'actions/global_actions.jsx';
-import Client from 'client/web_client.jsx';
 import * as Utils from 'utils/utils.jsx';
 import * as UserAgent from 'utils/user_agent.jsx';
 import * as ChannelActions from 'actions/channel_actions.jsx';
@@ -158,24 +157,16 @@ export default class CreatePost extends React.Component {
 
         GlobalActions.emitUserPostedEvent(post);
 
-        Client.createPost(post,
-            (data) => {
-                PostStore.removePendingPost(post.pending_post_id);
-
-                AppDispatcher.handleServerAction({
-                    type: ActionTypes.RECEIVED_POST,
-                    post: data
-                });
+        PostActions.createPost(post, false,
+            () => {
+                // DO nothing.
             },
             (err) => {
                 if (err.id === 'api.post.create_post.root_id.app_error') {
                     // this should never actually happen since you can't reply from this textbox
                     this.showPostDeletedModal();
-
-                    PostStore.removePendingPost(post.pending_post_id);
                 } else {
-                    post.state = Constants.POST_FAILED;
-                    PostStore.updatePendingPost(post);
+                    this.forceUpdate();
                 }
 
                 this.setState({