Package resilient.bible.tei issues (style leaking, headers/folios disappearing)

[Omikhleia]

Probably present from some time, but I only returned to the "Gothic project" recently, after a hiatus...

• Some settings can leak outside their scope when collating sides notes, due to a missing popState() in an early return (e.g. italic, centering etc. can then propagate to the document)
• Bad interaction with book matters (and cover pages etc.) when enabled in a wrapping master document: the book matter logic cancels the headers and folios. We have to re-enable them at some point (in the TEI book tag, or in the resilient master, or both?)

The fixes are mere one-liners, though finding the root cause wasn't that immediate.