Fix RHS usernames and intro message usernames

web/react/components/rhs_thread.jsx

@@ -188,7 +188,7 @@ export default class RhsThread extends React.Component {
                             if (UserStore.getCurrentId() === selected.user_id) {
                                 p = UserStore.getCurrentUser();
                             } else {
-                                p = profiles[selected.user_id];
+                                p = profiles[comPost.user_id];
                             }
                             return (
                                 <Comment

web/react/utils/channel_intro_messages.jsx

@@ -47,7 +47,7 @@ export function createDMIntroMessage(channel) {
                 </div>
                 <div className='channel-intro-profile'>
                     <strong>
-                        <UserProfile userId={teammate.id}/>
+                        <UserProfile user={teammate}/>
                     </strong>
                 </div>
                 <p className='channel-intro-text'>