[Enhancement] Consider making RefreshView available with all Layout containers

[PureWeen]

xamarin/Xamarin.Forms#11675

Summary

Despite it being written on the RefreshView Documentation Page, I just sunk like 3 hours in trying to make a RefreshView work with another container. I think it should not depend on scrollable content, since there's no reason to disallow a StackLayout from being refreshed, if it's not in a ScrollView.

(Also I'd suggest to remove the RefreshView and replace it with an Behavior on either layout or ContentView.)

API Changes

Sorry - don't know.

Intended Use Case

Allow RefreshView to be used throughout Xamarin Forms instead of only with the scrollables (especially since nesting ScrollViews is problematic)

[KPixel]

Regarding removing the RefreshView and replacing it with a Behavior, what do you think of taking it one step further and adding it to a better layout design? More details here: #138