IAB fullscreen does not work

[ctgraham]

The Internet Archive Bookreader full-screen reading option does not function with this the rendering of Manuscripts.

The Islandora Internet Archive Bookreader module presumes that the fullscreen button will act on a div with the id of "book-viewer":
https://github.com/Islandora/islandora_internet_archive_bookreader/blob/691ba69a22a93e199f56288295efe7ca0e22ee46/js/islandora_book_reader.js#L836-L843

But the theming of the manuscript solution pack's manuscript view names this div as "manuscript-viewer":

islandora_solution_pack_manuscript/islandora_manuscript.module

Lines 182 to 184 in c0fee29

	'viewer_wrapper_attributes' => array(
	'id' => 'manuscript-viewer',
	),