Merge branch '361-build-system-bug-in-loading-used-overlays' into 'master'
Resolve "build-system: bug in loading used overlays"
Closes #361 (closed)
See merge request !369 (merged)
(cherry picked from commit afdaa632)
e8f38df1 build-system: bugfix if 'use_overlays' is empty
Co-authored-by: gsell achim.gsell@psi.ch