Add a "grab a screenshot" feature

I'd like to see the ability to grab a screenshot from the client computer. Ideally:

• it could be configured to happen with our without end user knowledge.
• It would transfer the file to my (host) computer.
• Optionally it could have a date/time stamp.
• It could capture one or all screens in a dual-screen environment.
• Bonus points if it could be scheduled.

This would be different from relying on the thumbnail and transferring the thumbnail via the existing work-around of increasing the thumbnail size and using a secondary tool to download the thumbnail. The work-around has some drawbacks, most notably needing to be a global change that increases bandwidth across an installation that occurs (at scale) during thumbnail periodic updates.

Thanks!