Have an option to set the "Resolution" field to 'None' or clear the resolution using automation rules

Currently, we are able to Edit the "Resolution" field to set some value but we are unable to clear the value of the "Resolution" field.

Suggested Solution:

It'd be good if we can clear the Resolution using Automation Rules or if we can set the value to 'None'

Workaround:

We can achieve this using the post function as mentioned in this KB for 

• How to clear the resolution field when the issue is reopened