set cookie for sidebar preference

js/index.js

@@ -33,6 +33,7 @@ import RequestsList from './components/requests_list'
 import ConfirmationPopover from './components/confirmation_popover'
 import { isNotInVerticalViewport } from './lib/viewport'
 import DateSelector from './components/date_selector'
+import SidenavToggler from './components/sidenav_toggler'
 
 Vue.config.productionTip = false
 
@@ -68,6 +69,7 @@ const app = new Vue({
     uploadinput,
     DateSelector,
     EditOfficerForm,
+    SidenavToggler,
   },
 
   mounted: function() {