Hiding the sla support structures after undo/redo

src/libslic3r/SLA/SLACommon.hpp

@@ -18,7 +18,7 @@ namespace sla {
     
 // An enum to keep track of where the current points on the ModelObject came from.
 enum class PointsStatus {
-    None,           // No points were generated so far.
+    NoPoints,           // No points were generated so far.
     Generating,     // The autogeneration algorithm triggered, but not yet finished.
     AutoGenerated,  // Points were autogenerated (i.e. copied from the backend).
     UserModified    // User has done some edits.