Add new Ellipse drawing object in Display Layouts (#4153)

* Add new ellipse drawing object to Display Layouts
- Fix test and linting issues;

Co-authored-by: Shefali Joshi <simplyrender@gmail.com>

src/plugins/condition/components/inspector/StylesView.vue

@@ -141,6 +141,7 @@ const NON_STYLEABLE_CONTAINER_TYPES = [
 const NON_STYLEABLE_LAYOUT_ITEM_TYPES = [
     'line-view',
     'box-view',
+    'ellipse-view',
     'image-view'
 ];