Kustomize split diff button doesnt work

[emosbaugh]

Expected behavior

Clicking the split diff button on the kustomize page should show the split diff

Actual behavior

It does not toggle the split diff. Still shows inline.

Information

• Ship version: 0.52.0
• Docker version: 19.03.5
• Command line run: ship init

Steps to reproduce the behavior

1. Use the integration/kustomize-overlay ship yaml here
2. Run ship init
3. Click a file and enter text to create a kustomize patch
4. Click on the split diff button in the diff viewer