Description of problem:
"Manage source" action is infinitely loading in the Actions menu on DataImportCron details page.

Version-Release number of selected component (if applicable):
v4.12.0-1507

How reproducible:
always

Steps to Reproduce:
1. Go to Virtualization > DataSources
2. Click on some DataSource
3. In the Details tab, click on DataImportCron (DIC)
4. In the DataImportCron Details page, click on Actions menu on the right

Actual results:
"Manage source" action is infinitely loading in the Actions menu.

Expected results:
"Manage source" action loading just for a while.