Add copy-to-clipboard button in the "Simulation Code" section

[hallegue]

It would be useful to add a copy-to-clipboard button in the simulation code section to make it easier for users to copy the code and paste it into R. Here are some packages that can help add this functionality:

• https://github.com/sbihorel/rclipboard
• https://github.com/deepanshu88/shinyCopy2clipboard

[EIvimeyCook]

I've created a work around that saves the code to an object. The user can then simply use cat(object) to get the code.