Update clear in Stack

src/style_manager/model/PropertyStack.js

@@ -428,6 +428,16 @@ export default Property.extend({
     return this.getLayers().length > 0 && !parentValue;
   },
 
+  /**
+   * Extended
+   * @private
+   */
+  clear(opts = {}) {
+    this.getLayers().reset();
+    this.__upTargetsStyleProps(opts);
+    return PropertyBase.prototype.clear.call(this);
+  },
+
   /**
    * This method allows to customize layers returned from the target
    * @param  {Object} target

test/specs/style_manager/model/Properties.js

@@ -289,7 +289,7 @@ describe('StyleManager properties logic', () => {
       });
     });
 
-    test.skip('On clear removes all values', () => {
+    test('On clear removes all values', () => {
       compTypeProp.clear();
       expect(compTypeProp.hasValue()).toBe(false);
       expect(compTypeProp.getLayers().length).toBe(0);