Allow mouseup to propagate, for consistency
Allow mouseup to propagate, for consistency

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