Copy/Paste Item Location in addition to Rotation

[orbtl]

https://github.com/valheimPlus/ValheimPlus/issues/755

This helps a building workflow when building multiple pieces at odd angles as you can immediately pick up from where your previous piece left off instead of struggling to try to get the next piece lined up when your initial anchor may have been different.

I also made the minor change to add a top-left message indicating things had been copied/pasted, as it bothered me before that I didn't know if the keystroke had been recognized or not.