Allow style-src as part of Egress Permissions for Custom UI apps

Description

As per this request: https://community.developer.atlassian.com/t/style-src-permission/46909

It has been flagged that we cannot do the following in the Manifest of Custom UI apps:

Which means that Forge developers cannot currently include css from 3rd party websites.

Environment

None
Done

Assignee

Jordan Koukides

Reporter

Xavier Caron