Looks like there is still old pop-up showing for updating the document in the document list.
Steps to Reproduce:
Login to zanata.
Go to dashboard
Select project and version
Click on document tab.
You will see the list of document in version.
Click on down arrow icon in front of document name
Select 'Update this document'
Observe the pop-up
Looks like update document pop-up is old not in react.
Update document pop-up should be like other pop-ups in react js which we have used for upload doc others
Attached screen captured for more info.