Having a period in the name of a widget will cause the editor to crash after copying and pasting (no error/warning given)

If a user has a period in the name of their widget and they then copy and paste that widget the editor will crash

1. Open Editor
2. Create a new widget blueprint
3. Add a text widget to the designer tab
4. Name the widget "." (no quotes)
5. With the text widget selected copy and paste is with Ctrl+C, Ctrl+V
6. Notice the editor crashes

Expected: The editor will throw an error when trying to use a period in the name of a widget or the editor will not crash when one is used
Result: Editor crashes when copying and pasting a widget with a period in the name