Fix console errors when logging out (#4915)

webapp/components/admin_console/admin_navbar_dropdown.jsx

@@ -137,7 +137,7 @@ export default class AdminNavbarDropdown extends React.Component {
                         <li>
                             <a
                                 href='#'
-                                onClick={GlobalActions.emitUserLoggedOutEvent}
+                                onClick={() => GlobalActions.emitUserLoggedOutEvent()}
                             >
                                 <FormattedMessage
                                     id='admin.nav.logout'

webapp/components/select_team/select_team.jsx

@@ -203,7 +203,7 @@ export default class SelectTeam extends React.Component {
             headerButton = (
                 <a
                     href='#'
-                    onClick={GlobalActions.emitUserLoggedOutEvent}
+                    onClick={() => GlobalActions.emitUserLoggedOutEvent()}
                 >
                     <span className='fa fa-chevron-left'/>
                     <FormattedMessage id='web.header.logout'/>

webapp/components/sidebar_header_dropdown.jsx

@@ -477,7 +477,7 @@ export default class SidebarHeaderDropdown extends React.Component {
                     <li>
                         <a
                             href='#'
-                            onClick={GlobalActions.emitUserLoggedOutEvent}
+                            onClick={() => GlobalActions.emitUserLoggedOutEvent()}
                         >
                             <FormattedMessage
                                 id='navbar_dropdown.logout'

webapp/components/sidebar_right_menu.jsx

@@ -442,7 +442,7 @@ export default class SidebarRightMenu extends React.Component {
                         <li>
                             <a
                                 href='#'
-                                onClick={GlobalActions.emitUserLoggedOutEvent}
+                                onClick={() => GlobalActions.emitUserLoggedOutEvent()}
                             >
                                 <i className='icon fa fa-sign-out'/>
                                 <FormattedMessage