• VSCode Version: 1.27.1
• OS Version: Windows 10 Pro

As of 1.27.1 "it is possible to use the middle mouse click in the Explorer view to open a file in a new editor". This should also be the case in the breadcrumbs explorer.

Steps to Reproduce:

1. Make sure breadcrumbs.enabled is set to true
2. Open a file
3. Open a file in the breadcrumbs explorer with middle mouse click
4. File is opened in preview mode

Does this issue occur when all extensions are disabled?: Yes