static/src/app/app.component.html

@@ -98,7 +98,7 @@
   <button mat-icon-button
           (click)="toggleSidebar()"
           *ngIf="router.url.includes('/stats')"
-          style="background: linear-gradient(-90deg, #dadada,transparent);">
+          style="background: linear-gradient(-90deg, #e8e5e5,#ffffff);margin-left: -12px;">
     <mat-icon svgIcon="chevron-left" *ngIf="sidebarOpen">
     </mat-icon>
     <mat-icon svgIcon="chevron-right" *ngIf="!sidebarOpen">

static/src/app/app.component.ts

@@ -73,6 +73,9 @@ export class AppComponent implements OnInit {
 
   toggleSidebar() {
     this.sidebarOpen = !this.sidebarOpen;
+    setTimeout(_ => {
+      window.dispatchEvent(new Event('resize'));
+    });
   }
 
   ngOnInit() {