View designer.html
<link rel="import" href="../core-scaffold/core-scaffold.html">
<link rel="import" href="../core-header-panel/core-header-panel.html">
<link rel="import" href="../core-menu/core-menu.html">
<link rel="import" href="../core-item/core-item.html">
<link rel="import" href="../core-icon-button/core-icon-button.html">
<link rel="import" href="../core-toolbar/core-toolbar.html">
<link rel="import" href="../core-field/core-field.html">
<link rel="import" href="../core-icon/core-icon.html">
<link rel="import" href="../core-input/core-input.html">
<link rel="import" href="../core-icons/core-icons.html">