Merge pull request #13310 from antonbsa/fix-breakout-extend-button-to-attendees

fix: Button to extend breakout rooms time is being shown for normal users

bigbluebutton-html5/imports/ui/components/breakout-room/component.jsx

@@ -490,7 +490,7 @@ class BreakoutRoom extends PureComponent {
             messageDuration={intlMessages.breakoutDuration}
             breakoutRoom={breakoutRooms[0]}
           />
-          {!visibleExtendTimeForm
+          {amIModerator && !visibleExtendTimeForm
             ? (
               <Button
                 onClick={this.showExtendTimeForm}