This changeset reverts some or all edits made in changesets 170917377, 170917397, 170917416, 170917445, 170917457, 170917483, 170917498, 170917530, 170917552, 170917584, 170917594, 170917618, 170917626, 170917641, 170917669, 170917712, 170917724, 170917741, 170917765, 170917816, 170917865, 170917897, 170917930, 170918002, 170918035, 170918049, 170918113, 170918174, 170918247, 170918323, 170918353, 170918390, 170918453, 170918464, 170918518, 170918568, 170918603, 170918656, 170918711, 170918763, 170918779, 170918806, 170918830, 170918844, 170918854, 170918865, 170918896, 170918942, 170918996, 170919086, 170919120, 170919130, 170919152, 170919169, 170919199, 170919231, 170919302, 170919364, 170919387, 170919427, 170919438, 170919466, 170919499, 170919552, 170919607, 170919680, 170919728, 170919753, 170919764, 170919778, 170919790, 170919823, 170919878, 170919907, 170919928, 170919949, 170919974, 170920020, 170920047.