Add breadcrumbs to Media Editors

[jumbosushi]

What behavior were you expecting?

When I open Media editors (image, gallery, etc), I expect bread crumbs in the editor toolbar like in Articles page

What actually happened?

Image and Gallery editors are missing breadcrumbs to go back to index page

Steps to reproduce

Check out this example image

What was your environment like?

Google Chrome 74.0.3729.131 on Ubuntu 16.04 LTS

Getting Started

Breadcrumbs in ArticleEditor (this line) uses react-router's <Link> component.

Breadcrumbs in ItemEditor (this line) that is being used by ImageEditor already have <Link> component set up. I suspect this error has to do with wrong / missing props