Copy map bug: Same map after copy

[JannikStreek]

Describe the bug
When a map is copied, the url does change. But the map inside the browser does not. Meaning: You think you are working on a new copied map but in reality you are still working on the old one! One needs to refresh first and really load the new map.

To Reproduce
Steps to reproduce the behavior:

1. Go to copy/share window and press copy
2. Click on the copy button
3. Add a new node
4. Refresh page => Node is gone (as it was added to the old map).

Expected behavior
Idea to solve: Really load the new url and not only replace it in the browser url.
Also: If possible, please add a tab with this url and not just use the same tab.