Selecting a Version in the Backlog view greys out all epics tied to that version

[adam.eidelsafy]

Steps to reproduce

1. Create two epics named  `1st Epic` and `2nd Epic`
2. Create a version named `Test Version`
3. Set the `1st Epic`'s fix version field to the newly created `Test Version`
4. Go to the Backlog 
5. Click on Versions
6. Click on Epics
7. Select the Version named `Test Version`

Expected Behavior

1. `1st Epic` is not greyed out
2. `2nd Epic` is greyed out

Actual Behavior

• All epics are greyed out regardless of their Fix Version value