Papers 47.rc
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Papers has seen mostly maintenance work (fixing issues) and internal
refactorings since 47.beta. Some changes we can highlight:

meson:
* Remove "platform" build option, as not needed

libppsview:
* Many of the helper classes for search, bookmarks, attachments, etc. have
  been moved from shell to the view, so that integration logic can be further
  cleaned up
* Zooming with a mouse or touchpad now has a lot more room, and requires less
  precision

shell:
* The sidebar a document is opened at is now set based on the last opened
  document, and not on metadata stored on the file itself. This solves several
  issues with document opening