Description of problem:
Delete secret from the VM shows an error:
"Cannot assign to read only property 'spec' of object '#<Object>'"

By click the "Clear" button has no this issue, since there is a clear button, it seems "Delete secret" is a redundant button.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Create a VM and add a secret for it
2. Then delete secret from the VM and click Save
3.

Actual results:

Expected results:

Additional info: