Embedded BR should open IA in new tab if fullscreen exited

Currently, clicking the IA button or the exit fullscreen button minimized bookreader inside the iframe. It should instead open the `/details/` page in a new tab/window.

**Evidence / Screenshot (if possible)**

> Include evidence of the problem or provide a screenshot.

**Expectation**

> What should be happening? What will it look like / how will it behave when fixed?

**Context**

> What operating system? What browser type and version?

**Proposal & Constraints**

> What is the proposed solution / implementation? Is there a precedent of this approach succeeding elsewhere?

**Stakeholders**

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