When testing is disabled, make labelling consistent

Description

Steps to reproduce

1. Create an AB test for a content item.
2. Disable the AB test in admin mode.
3. Go to Edit mode and view the disabled label.

Expect:
When the test is disabled, labels are consistent.

Actual:
When you open a running test page, its label is different from the "pick a winner" test page.
But if you close the pick a winner test page, and re-open a running test page, the labels of these pages are the same.