Code review suggestions.

src/widgets/chat-message.jsx

@@ -62,7 +62,8 @@ class BaseChatMessage extends React.PureComponent {
     e.preventDefault();
     e.stopPropagation();
     const menuItems = this.props.received == Tinode.MESSAGE_STATUS_FAILED ? ['menu_item_send_retry'] : [];
-    if (this.props.received >= Tinode.MESSAGE_STATUS_FAILED &&
+    if (this.props.userIsWriter &&
+        this.props.received > Tinode.MESSAGE_STATUS_FAILED &&
         this.props.received < Tinode.MESSAGE_STATUS_DEL_RANGE) {
       menuItems.push('menu_item_reply');
     }
@@ -82,7 +83,9 @@ class BaseChatMessage extends React.PureComponent {
     e.preventDefault();
     e.stopPropagation();
     const replyToSeq = this.props.replyToSeq;
-    this.props.onQuoteClick(replyToSeq);
+    if (replyToSeq) {
+      this.props.onQuoteClick(replyToSeq);
+    }
   }
 
   render() {

src/widgets/doc-preview.jsx

@@ -46,7 +46,7 @@ export default class DocPreview extends React.PureComponent {
         <SendMessage
           noInput={true}
           tinode={this.props.tinode}
-          viewportWidth={this.props.viewportWidth}
+          viewportWidth={this.props.viewportWidth}  // Used by `formatter`.
           replyTo={this.props.replyTo}
           formatter={this.props.formatter}
           onCancelReply={this.props.onCancelReply}

src/widgets/image-preview.jsx

@@ -74,7 +74,7 @@ export default class ImagePreview extends React.PureComponent {
             messagePrompt="add_image_caption"
             acceptBlank={true}
             tinode={this.props.tinode}
-            viewportWidth={this.props.viewportWidth}
+            viewportWidth={this.props.viewportWidth}  // Used by `formatter`.
             replyTo={this.props.replyTo}
             formatter={this.props.formatter}
             onCancelReply={this.props.onCancelReply}