Once we click on Download all for offline translation and downloaded the zip file.
After that if we click again on any of the project and version the same pop-up comes again.
Steps to Reproduce:
Login to zanata.
Click on dashboard.
Select any project and version.
Select language and doc and click on "Download all for offline translation"
Download the file.
Go back to the project and again click on verison.
Or click on different project and version
Observe the behaviour.
Download all for offline translation pop-up comes multiple times.
Once we downloaded file the pop-up dose not have to comes again.
Fedora + Firefox 52 64bit.