No hierarchical masking in submaps

Submaps have no longer hierarchical masking of the content by pathways or compartments, regardless of the view mode set in "General overlays".

created branch 303-no-hierarchical-masking-in-submaps

mentioned in merge request !231 (merged)

closed via merge request !231 (merged)

closed via commit 487bf5e4

mentioned in commit 487bf5e4