Provide GPO policy spec files and implement them to let admins control network settings in BrowserPicker from policy

[mortenn]

To make IT departments amenable to allowing this tool, give them the ability to control security-relevant settings centrally.

[mortenn]

Admin provided whitelist of domain suffixes to scan automatically is a good addition

[mortenn]

Admin provided certificate/ca pinning that triggers warnings on mismatch is another good feature

[mortenn]

if certificate pinning is enabled, we should probably always autoscan tls for pinned domain suffixes, but make that an option in the gpo as well

[mortenn]

options controlled by gpo, be they locked on or off should be disabled in ui and have a tooltip that says "controlled by administrator"