Description of problem:
Need "Reset to defaults" option for "manage columns" in "All Hosts"

Version-Release number of selected component (if applicable):

6.15.0

How reproducible:
100%

Steps to Reproduce:
1. Select most of the columns from Satellite WEB-UI --> Hosts --> "All host" --> "Manage column".

Actual results:
1. If we select all the applicable options in the managing column then it collides the host details in the host list which makes it difficult for the end user to read the host details. Also, it would be easy to revert changes made with the "restore to defaults" option.

Expected results:

If we have the "restore to default" option in the "manage column" then it will be easy to revert the changes and to list the default columns in Satellite WEB-UI --> Hosts --> "All host"

Additional info: