prevent mouse selection of hidden objects

src/main/mesh.js

@@ -401,7 +401,7 @@ function space_init(data) {
                 }
             }
         } else {
-            return api.objects();
+            return api.objects().filter(o => o.visible);
         }
     });
 

src/mesh/api.js

@@ -36,7 +36,7 @@ let toggle = {
 let selection = {
     // @returns {MeshObject[]} or all groups if not strict and no selection
     list(strict = false) {
-        return selected.length || strict  ? selected.slice() : groups.slice();
+        return selected.length || strict ? selected.slice() : groups.slice();
     },
 
     // return selected groups + groups from selected models