Fixes bug in Joystick control where the control was being rendered in the incorrect position (top left corner of the screen) when it was being defined within a container.

Fixes sample03-character gamepad so that controls are relatively positioned instead of absolutely positioned. Buttons now render on screen for resolutions different from the playbook.

gameplay/src/Joystick.cpp

@@ -201,7 +201,7 @@ void Joystick::drawImages(SpriteBatch* spriteBatch, const Rectangle& clip)
     if (_absolute || (!_absolute && _state == ACTIVE))
     {
         if (_absolute)
-            _region = _bounds;
+            _region = _viewportClipBounds;
 
         // Draw the outer image.
         Theme::ThemeImage* outer = getImage("outer", _state);