Allow Layout Gallery of ArcGIS Pro to have custom page sizes added to it

Idea created by knewell@cob.org on Sep 25, 2017
    Reviewed
    Score170

    It would be nice for custom layouts (.pagx) to show up in the "New Layout" window instead of having to click "import layout file". This would be really helpful for our organization as we are developing project templates to use across the organization.