Support history preview outside of publication

[ElliotSilver]

https://chat.fhir.org/#narrow/channel/196008-ig-publishing-requirements/topic/History.20page.20preview.20as.20part.20of.20autobuild/with/523793104 discusses a request to be able to preview the history page as part of a non-publication build.

[ElliotSilver]

I am sympathetic to @Healthedata1's request, but see practical issues with an exact preview, as it required previous publication information, the history templates, and history styling. Perhaps a pseudo-preview of an unstyled page listing only the current release would be a reasonable compromise. Alternatively, replicating the current build's history entry in the QA report would be sufficient.

[lmckenzi]

Will render the relevant portions of the history on the QA page so it's possible to see it prior to publication.