Addressed GH-153 - enabled NetBeans platform keyboard shortcut for closing topcomponents: Ctrl+W

Author: jisedlac

visualvm/appui/src/org/graalvm/visualvm/modules/appui/layer.xml

@@ -170,6 +170,10 @@
         <file name="S-F9.instance_hidden"/>
         <file name="AS-F2.instance_hidden"/>
         <file name="CS-F2.instance_hidden"/>
+        
+        <file name="D-W.shadow">
+            <attr name="originalFile" stringvalue="Actions/Window/org-netbeans-core-windows-actions-CloseWindowAction.instance"/>
+        </file>
     </folder>
     <folder name="Toolbars">
         <file name="File_hidden"/>