Allow Custom Visuals in Content Packs

[fbcideas_migusr]

Custom visuals opens Power BI up to a lot more power than it had previously, but there is presently a bug that doesn't allow security approval for custom visuals in content packs. This could severely limit adoption of content pack usage, custom visuals, and limit scalability of this tool to large, diverse-workflow groups. Please consider kicking this item higher in your planned queue.