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Add navbar to board history storage

Description

Add navbar to board history storage

Navbar is in ReverseChronologicalPager, so I've extended that in
order to reuse the existing code.
However, I didn't want to abandon the template-rendering, so I
didn't implement formatRow.

Bug: T67088
Change-Id: Ib080532d92bef14310ebda5cd222ff27dd241e48