[JIRAALIGN-1731] Ideation: No possibility to unmap Feature from the Idea

Issue Summary

Ideation: No possibility to unmap Feature from the Idea

Steps to Reproduce

1. Login
2. Go to the Ideation. 
3. Create the Idea. 
4. Go to the Manage Backlog. 
5. Click on more actions(three dots) one the Idea from Step 3. 
6. Click on Map to Feature. 
7. Select any Program, Release, and Feature. 
8. Click Map. 
9. Open Idea edit Panel. 
10. Click on cross icon next to Feature title in Work item. 
11. Click Save. 

Expected Results

Changes are saved, Idea is unmapped from the Feature. 

Actual Results

Changes are reverted. 

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available