Clicking edit button is not working for Control Traffic Options in new UI

[musharani]

Build - ocata 5.0.1-122
Steps to repro:
---------------
1. Go to Infrastructure->Cluster->Advanced Options->Quality of Service->Control Traffic Options in new UI.
2. Click Edit.

While clicking edit the below error is seen console. After that not able to click any other menus. It is working after refreshing the page only

6cfc3e9ab72cd03eae9d.app.js?ee9ea7d5325f4d73b3c1:1 Uncaught TypeError: Cannot read property 'toString' of undefined
    at 6cfc3e9ab72cd03eae9d.app.js?ee9ea7d5325f4d73b3c1:1
    at Map.withMutations (vendor.js?ee9ea7d5325f4d73b3c1:1)
    at __webpack_exports__.a (6cfc3e9ab72cd03eae9d.app.js?ee9ea7d5325f4d73b3c1:1)
    at SchemaFormModal.render (6cfc3e9ab72cd03eae9d.app.js?ee9ea7d5325f4d73b3c1:1)
    at ReactCompositeComponentWrapper._renderValidatedComponentWithoutOwnerOrContext (vendor.js?ee9ea7d5325f4d73b3c1:70)
    at ReactCompositeComponentWrapper._renderValidatedComponent (vendor.js?ee9ea7d5325f4d73b3c1:70)
    at ReactCompositeComponentWrapper.performInitialMount (vendor.js?ee9ea7d5325f4d73b3c1:70)
    at ReactCompositeComponentWrapper.mountComponent (vendor.js?ee9ea7d5325f4d73b3c1:70)
    at Object.mountComponent (vendor.js?ee9ea7d5325f4d73b3c1:21)
    at ReactCompositeComponentWrapper.performInitialMount (vendor.js?ee9ea7d5325f4d73b3c1:70)

vendor.js?ee9ea7d5325f4d73b3c1:21 Uncaught TypeError: Cannot read property 'getHostNode' of null
    at Object.getHostNode (vendor.js?ee9ea7d5325f4d73b3c1:21)
    at ReactCompositeComponentWrapper.getHostNode (vendor.js?ee9ea7d5325f4d73b3c1:70)
    at Object.getHostNode (vendor.js?ee9ea7d5325f4d73b3c1:21)
    at ReactCompositeComponentWrapper.getHostNode (vendor.js?ee9ea7d5325f4d73b3c1:70)
    at Object.getHostNode (vendor.js?ee9ea7d5325f4d73b3c1:21)
    at ReactCompositeComponentWrapper.getHostNode (vendor.js?ee9ea7d5325f4d73b3c1:70)
    at Object.getHostNode (vendor.js?ee9ea7d5325f4d73b3c1:21)
    at ReactCompositeComponentWrapper.getHostNode (vendor.js?ee9ea7d5325f4d73b3c1:70)
    at Object.getHostNode (vendor.js?ee9ea7d5325f4d73b3c1:21)
    at ReactCompositeComponentWrapper.getHostNode (vendor.js?ee9ea7d5325f4d73b3c1:70)

[Sarin Kizhakkepurayil (sarink)]

https://github.com/Juniper/contrail-ui/pull/1155