Issue color is non editable in bulk update screen

Issue Summary

The issue color custom field holds the Epic color. However, in the bulk edit, this field can't be updated.

Steps to Reproduce

1. Create a new next-gen project.
2. Create an Epic.
3. Go to issue navigator and choose bulk edit.
4. In the Edit screen, this field can't be updated.
   

Expected Results

As the next-gen project does not have Epic color, the custom field Issue-color should be editable.

Actual Results

The field is noneditable.

Workaround

Change the color from the edit/view screen.