new feature

I would like to add the following feature..

currently when adding a new menu item for "Galleries Listing Layout"

the available option is to select the galleries I need to list.

I would suggest to add 2 more options:

option 1: list all galleries >> this will list all the available galleries
option 2: list all galleries except the selected >> this will list only the non-selected galleries


We need this feature because we may use one gallery as a frontpage slideshow and we dont need this gallery to appear again in the galleries page.

because now I need to go back to the galleries menu item everytime I add a new gallery to select it ..

thank you for your time:)