'Open' column can not be hide from Explore list.

Description of problem:
As summary

Version-Release number of selected component (if applicable):
https://maitai-bpms.app.qa.eng.nay.redhat.com based on BPMS6.0.0

How reproducible:
100%

Steps to Reproduce:
1. Admin login maitai-bpms site.
2. Clicking Authoring->Project Authoring->Explorer->Recently Edited.
3. Click the column list icon.

Actual Result:
There is no Open column shown in the list, so user can not hide the open column.

Expected Result:
Open column should shown in the list to let user to hide it.
About this point, Search list has open column.

Additional info: