A function to applying 'Smooth' filter cannot set in right-click menu

Some users apply Image Enhancements Filter to view images on UView.

Especially they often use Sharpen filter and Smooth filter.

In Sharpen filter can be set to right-click menu but Smooth filter cannot because it does not contain in selectable items.

So users have to do following steps to apply Smooth filter.

1. Select 'Image Enhancements Filter' function in right-click menu.

2. Select 'Smooth' filter in pull-down menu.

3. Click 'Applied to all image' button.

4. Click 'Done' button.

The user wants to apply 'Smooth' filter to all images in one action same as 'Sharpen' filter.