Feature request: share code with students via URL

[mrcronk]

With the popularity of PRIMM as an approach to teaching programming, it would be really helpful to be able to view remotely hosted code in Mu and share a URL to access that with students (like can be done with (http://pythontutor.com/ and https://create.withcode.uk) so that code from the Predict activity with students and avoid the need for them to download from VLE or network drive and then find where they downloaded it and then open it.