Add Screenshot functionality?

[therebelrobot]

I'd love to get a screenshot functionality to get the current state of the application when they submit feedback. This could be done with some html5 canvas magic, and I'd defs be happy to look into a PR myself if it's wanted in the project.

[rishipr]

That sounds likes a fantastic idea! I unfortunately do not have have the bandwidth right now to work on this project so definitely welcome any contributions @therebelrobot.

[Derewith]

Gonna start working on this PR it's needed

[ThisTemba]

Would also love to see this feature!