Fix typo in css.
Fix typo in css.

gootdude/bookreader,nikolas/bookreader,brisandbeans/bookreader,brisandbeans/bookreader,gootdude/bookreader,yankl/bookreader,yankl/bookreader,Islandora/internet_archive_bookreader,internetarchive/bookreader,openlibrary/bookreader,brisandbeans/bookreader,niksu/bookreader,niksu/bookreader,Islandora/internet_archive_bookreader,openlibrary/bookreader,niksu/bookreader,nikolas/bookreader,gootdude/bookreader,gootdude/bookreader,yankl/bookreader,niksu/bookreader,garyrh/bookreader,Islandora/internet_archive_bookreader,openlibrary/bookreader,Islandora/internet_archive_bookreader,garyrh/bookreader,yankl/bookreader,garyrh/bookreader,niksu/bookreader,garyrh/bookreader,yankl/bookreader,brisandbeans/bookreader,brisandbeans/bookreader,openlibrary/bookreader,openlibrary/bookreader,garyrh/bookreader,internetarchive/bookreader,Islandora/internet_archive_bookreader