Add toolbar separator (#4890)

* Add option to add toolbar separator after toolbar component

src/sql/workbench/api/node/extHostModelView.ts

@@ -428,7 +428,8 @@ class ToolbarContainerBuilder extends GenericContainerBuilder<azdata.ToolbarCont
 		let componentWrapper = toolbarComponent.component as ComponentWrapper;
 
 		return new InternalItemConfig(componentWrapper, {
-			title: toolbarComponent.title
+			title: toolbarComponent.title,
+			toolbarSeparatorAfter: toolbarComponent.toolbarSeparatorAfter
 		});
 	}