PLT-5174 Mobile view: Send message link in popover doesn't close RHS (#5017)

* Fixed send message link in popover doesn't close RHS

* added isMobile check for closing the rhs when click on send message button from profile popover

webapp/components/profile_popover.jsx

@@ -83,6 +83,9 @@ export default class ProfilePopover extends React.Component {
         openDirectChannelToUser(
             user,
             (channel) => {
+                if (Utils.isMobile()) {
+                    GlobalActions.emitCloseRightHandSide();
+                }
                 this.setState({loadingDMChannel: -1});
                 if (this.props.hide) {
                     this.props.hide();