NO BUG: Custom breakpoint lost all of elements style

[Michael]

This would tie in nicely to consider this feature request perhaps

Copy settings to different breakpoint

A few times now I have been editing a page and found at some point I selected a different breakpoint to make an adjustment and forgot to switch back to desktop, which means that all of my adjustments thereafter are for that breakpoint only. I think adding a feature that would allow us to copy styles/settings across breakpoints might alleviate some frustrations down the road.