fix(touch): Allow for multi-touch in OHIF (#5099)

extensions/cornerstone/src/customizations/viewportToolsCustomization.ts

@@ -14,11 +14,11 @@ export default {
       },
       {
         toolName: toolNames.Zoom,
-        bindings: [{ mouseButton: Enums.MouseBindings.Secondary }],
+        bindings: [{ mouseButton: Enums.MouseBindings.Secondary }, { numTouchPoints: 2 }],
       },
       {
         toolName: toolNames.StackScroll,
-        bindings: [{ mouseButton: Enums.MouseBindings.Wheel }],
+        bindings: [{ mouseButton: Enums.MouseBindings.Wheel }, { numTouchPoints: 3 }],
       },
     ],
     enabled: [