fix(checkboxes): visual bug with labels checkboxes

src/app/form/form-view/structure-form/structure-labels/structure-labels.component.scss

@@ -4,7 +4,11 @@
   flex-wrap: wrap;
 
   app-checkbox-form {
-    flex-grow: 1;
-    flex-basis: 0;
+    flex-grow: 0;
+    flex-basis: calc(50% - 8px);
+
+    @media (max-width: 600px) {
+      flex-basis: 100%;
+    }
   }
 }