Customise window decorations, add openfolder action to menu, fix toolbar colours

src/app/file-tree/file-tree.component.ts

@@ -40,7 +40,7 @@ interface FileNode {
       <button mat-icon-button disabled></button>
       {{ node.file.name }}
     </mat-tree-node>
-    <mat-tree-node *matTreeNodeDef="let node; when: hasChild">
+    <mat-tree-node *matTreeNodeDef="let node; when: hasChild" matTreeNodeToggle>
       <button
         mat-icon-button
         matTreeNodePadding
@@ -51,7 +51,7 @@ interface FileNode {
           chevron_right }
         </mat-icon>
       </button>
-      {{ node.name }}
+      {{ node.file.name }}
     </mat-tree-node>
   </mat-tree>`,
   styleUrl: './file-tree.component.scss',