Set Default Layout Size to 0 #1938
Description
Is your feature request related to a problem? Please describe.
While working on MultiView enhancements #1866, it was discovered that the default layout size has always been 1, even when the layout is default constructed and empty.
Describe the solution you'd like
It would make more sense to set the default layout size to 0, if it is default constructed. However, this is likely an API-breaking change.