Feature - Allow copying query in Data Explorer

[jquesada2016]

Currently, when you review changes in the Data Explorer, you can see a sample review query detailing the changes that are about to take place. It would be great if this query could be copied, for further modification, or to learn and play with it in the editor or other tools.

[jquesada2016]

This would also allow #392 to be less of an issue, as you can fix the erroneous generated insert query.