Prevent multiple clicks on post retry (#6055)

webapp/components/post_view/components/pending_post_options.jsx

@@ -14,13 +14,23 @@ import React from 'react';
 export default class PendingPostOptions extends React.Component {
     constructor(props) {
         super(props);
+
         this.retryPost = this.retryPost.bind(this);
         this.cancelPost = this.cancelPost.bind(this);
+
+        this.submitting = false;
+
         this.state = {};
     }
     retryPost(e) {
         e.preventDefault();
 
+        if (this.submitting) {
+            return;
+        }
+
+        this.submitting = true;
+
         var post = this.props.post;
         queuePost(post, true, null,
             (err) => {
@@ -30,9 +40,7 @@ export default class PendingPostOptions extends React.Component {
                     this.forceUpdate();
                 }
 
-                this.setState({
-                    submitting: false
-                });
+                this.submitting = false;
             }
         );