Copy connector/adapter should specify a number of times to do it

From IDB-281, the copy functionality should have a text box (that defaults to 1), that allows for multiple copies to be created. It should append the number to the base name.

Ensure that checks for conflicting names occur for each iteration, skipping any conflicts. Please do this with some thought, so that the same checked items are ignored for the next iteration. eg an internal method taking a start seed.

Unit tests as usual.

Thanks.