Branches: Show MR popover on hover of MR badge

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Context

In the Issues pages, whenever a user hovers over an MR link, an information-rich popover appears with useful info about the related MR.

However, when users hover over the MR badge in the Branches page, this popover does not appear. This is a missed opportunity to provide users with information that could be useful in context, and make our platform more consistent between products.

Hovering over an MR link in Issues	Hovering over an MR badge in Branches page

Design proposal

When a user hovers over the MR badge in the Branches page, show the MR popover currently used in Issues pages.