Make page sidebar buttons dock to top of sidebar

src/app/app.component.html

@@ -7,8 +7,6 @@
             <ion-menu-toggle menu="first" autoHide="false"></ion-menu-toggle>
           </ion-title>
         </ion-toolbar>
-      </ion-header>
-      <ion-content>
         <ion-list>
           <ion-list-header>
             <ion-buttons>
@@ -29,7 +27,9 @@
               </ion-button>
             </ion-buttons>
           </ion-list-header>
-
+        </ion-list>
+      </ion-header>
+      <ion-content>
           <tree-root style="font-size: 15px;" #menuTree [nodes]="nodes" [options]="options">
             <ng-template #treeNodeTemplate let-node let-index="index">
               <span class="tree-node-container" style="display: flex; padding: 5px; width: 100%;" [ngClass]="node.data.type">
@@ -38,7 +38,6 @@
               </span>
             </ng-template>
           </tree-root>
-        </ion-list>
       </ion-content>
       <ion-footer>
         <ion-item button lines="full" (click)="showOptions($event)">