Fix multiple dialogs opening on item click

Author: AgusPereyraW

flutter-lib/lib/src/impl/control_evolve.dart

@@ -153,7 +153,7 @@ abstract class ControlImpl<T extends ControlSwt, V extends VControl>
           ..button = _lastButton
           ..x = e.localPosition.dx.round()
           ..y = e.localPosition.dy.round()
-          ..count = 1;
+          ..count = 2;
         this.widget.sendMouseMouseDown(state, event);
       },
       onPointerUp: (e) {

swt_native/src/web/java/org/eclipse/swt/widgets/DartTable.java

@@ -1033,7 +1033,7 @@ public int getItemCount() {
      */
     public int getItemHeight() {
         checkWidget();
-        return RequestResponse.call(this, "GetItemHeight", null, Integer.class, 500, 20);
+        return RequestResponse.call(this, "GetItemHeight", null, Integer.class, 100, 20);
     }
 
     /**