Create new gallery from edit post/page

Hey would it be possible to add the option to create a new gallery when you click the “add gallery” button on edit post/page?

Currently we can only add galleries that have been previously created using the galleries section. But its pretty annoying that I have to create the gallery first, then go to create a new post or page.

Would be awesome to be able to create a new gallery whilst editing / creating a new post or page

The page I need help with: [log in to see the link]