VUIDLBrowser no longer requires shift-click to 'highlight component on server', open recursively changed to 'alt-click', for #12058

Change-Id: If0a359258c5f123a52a27860a8af2c52726e564c

client/src/com/vaadin/client/SimpleTree.java

                 if (event.getNativeEvent().getEventTarget().cast() == handle) {
                     if (children.getStyle().getDisplay().intern() == Display.NONE
                             .getCssName()) {
-                        open(event.getNativeEvent().getShiftKey());
+                        open(event.getNativeEvent().getAltKey());
                     } else {
                         close();
                     }

client/src/com/vaadin/client/VUIDLBrowser.java

  */
 @Deprecated
 public class VUIDLBrowser extends SimpleTree {
-    private static final String HELP = "Shift click handle to open recursively. "
-            + " Click components to highlight them on client side."
-            + " Shift click components to highlight them also on the server side.";
+    private static final String HELP = "Alt-click handle to open recursively. ";
     private ApplicationConnection client;
     private String highlightedPid;
 
 
         protected StateChangeItem() {
             setTitle(HELP);
-
             addDomHandler(new MouseOutHandler() {
                 @Override
                 public void onMouseOut(MouseOutEvent event) {
         protected void select(ClickEvent event) {
             ServerConnector connector = getConnector();
 
-            if (connector != null && event != null
-                    && event.getNativeEvent().getShiftKey()) {
+            if (connector != null && event != null) {
                 connector.getConnection().highlightConnector(connector);
             }