Allow Page Builders to disable UX pages from appearing on Mobile

Some UX pages are not suitable for Mobile use such as those with very large data grids. Page Builders may also want to control the layout of pages to make them easier to use on Mobile, but while keeping a great visual experience on the web as well by utilising spacer cards for example.

Page Builders should have the ability to opt a page out of being visible on Mobile so that they can present the right page to their end users without the users opening the version of the page intended for web use.