Fix #363 : form.submit()

gwtquery-core/src/main/java/com/google/gwt/query/client/GQuery.java

@@ -240,6 +240,9 @@ public class GQuery implements Lazy<GQuery, LazyGQuery> {
       if (o instanceof IsWidget) {
         return $(Arrays.asList(o));
       }
+      if (o instanceof Element) {
+        return new GQuery((Element) o);
+      }
       if (o instanceof JavaScriptObject) {
         JavaScriptObject jso = (JavaScriptObject) o;
         // Execute a native javascript function like jquery does