improve normalization of workspsace nodes

Author: dylanvorster

demo/stories/helpers/tools.tsx

@@ -31,17 +31,18 @@ import { ConvertToTrayZone, getDirectiveForTrayModel } from '@projectstorm/react
 import { css, Global } from '@storybook/theming';
 
 export const genVerticalNode = () => {
+  const m1 = new DefaultWorkspacePanelModel('Panel 1');
+  m1.minimumSize.update({
+    width: 10,
+    height: 100
+  });
+
   const m2 = new DefaultWorkspacePanelModel('Panel 2');
   m2.minimumSize.update({
     width: 10,
     height: 100
   });
-  const node = new ExpandNodeModel()
-    .setExpand(false, true)
-    .setVertical(true)
-    .addModel(new DefaultWorkspacePanelModel('Panel 1').setExpand(false, false))
-    .addModel(m2);
-  return node;
+  return new ExpandNodeModel().setExpand(false, true).setVertical(true).addModel(m1).addModel(m2);
 };
 
 export enum DebugOptions {

packages/core/src/entities/node/WorkspaceNodeModel.ts

@@ -46,6 +46,7 @@ export class WorkspaceNodeModel<
     super.normalize();
     if (this.parent && this.parent instanceof WorkspaceCollectionModel) {
       if (this.children.length === 1) {
+        this.children[0].size.update(this.size.value);
         this.parent.replaceModel(this, this.children[0]);
       }
     }