message: component ui tweak
diff: @@ -208,7 +208,9 @@ class ComponentListControls extends PurePluginUIComponent {
  render() {
  const componentGroups = this.plugin.managers.structure.hierarchy.componentGroups;
  - return componentGroups.map(g => <StructureComponentGroup key={g[0].cell.transform.ref} group={g} />)
  + return <div style={{ marginTop: '8px' }}>
  + {componentGroups.map(g => <StructureComponentGroup key={g[0].cell.transform.ref} group={g} />)}
  + </div>;
  }
  }
  