Reuse page background colour logic in drawLeafsTwoPage
Reuse page background colour logic in drawLeafsTwoPage

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