fix(wsi): mount WSI/SM viewports via setDisplaySets (#6107)

tests/utils/screenShotPaths.ts

@@ -224,6 +224,9 @@ const screenShotPaths = {
   workList: {
     scrollBarRenderedProperly: 'scrollBarRenderedProperly.png',
   },
+  wsi: {
+    wsiDisplayedCorrectly: 'wsiDisplayedCorrectly.png',
+  },
 };
 
 export { screenShotPaths };