Feature Request: Masonry Blog 'All Categories'

I have my blog set up as a full-width masory blog, and where it says ‘Which entries?’ I have selected ‘Categories’ and then manually selected all of the categories from my blog posts. The problem is, if I later add a new blog post and assign it a new category, it doesn’t show up on my main blog page unless I remember to go back add add that category to the masonry grid.

It would be great if there was an option for “All Categories”, so that they are automatically included in the masonry grid when they are added to the blog.

Thanks for your consideration!!