cleaning the code

src/vs/base/browser/ui/hover/hover.css

@@ -3,6 +3,10 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
+.resizable-hover {
+	z-index: 50;
+}
+
 .monaco-hover {
 	cursor: default;
 	position: absolute;