Upgrade to Ionic 5 and Angular 9 Ivy

src/app/pages/editor/editor.page.html

@@ -2,11 +2,7 @@
   <ion-header (keydown)="onEditorKeydown($event)">
     <ion-toolbar>
       <ion-buttons slot="start">
-        <ion-menu-toggle>
-          <ion-button>
-            <ion-icon slot="icon-only" name="menu"></ion-icon>
-          </ion-button>
-        </ion-menu-toggle>
+        <ion-menu-button></ion-menu-button>
       </ion-buttons>
       <ion-title #titleBar>
         <div contenteditable="true"> {{ pageRecord.Name }} </div>

src/app/pages/editor/editor.page.ts

@@ -19,7 +19,7 @@ export class EditorPage implements OnInit {
   public visibleButtons: Array<number> = [];
 
   @ViewChildren('editorHosts') editorHosts;
-  @ViewChild('titleBar', {static: false}) titleBar;
+  @ViewChild('titleBar') titleBar;
 
   constructor(
     protected pages: PageService,