Use Publisher field for Publisher Group instead of bookshelves

[hatton]

Also, allow grid filtering on publisher & original publisher

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This change is 

[andrew-polk]

Reviewed 11 of 11 files at r1.
Reviewable status: all files reviewed, 3 unresolved discussions (waiting on @hatton)

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src/components/BookShelfGroup.tsx, line 99 at r1 (raw file):

us

use (if you're making changes)

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src/components/PublisherGroup.tsx, line 16 at r1 (raw file):

us

use (if you're making changes)

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src/connection/LibraryQueryHooks.ts, line 683 at r1 (raw file):

publisher

originalPublisher