Is there any way to make "Jira Issues" field on differential revisions required?
I see 2 possible ways:
* allow changing field required status via `differential.fields` setting (right now it allows to disable some fields)
* add the "Jira Issues" field in there so we can enable/disable/make required stuff on it as well
OR
Add the "Jira Issues" in the Herard Rule creator for Differential Diff Content so we can block user from creating differential revision that doesn't have "Jira Issues" field.
{F208512}