CellSens: sort arrays of pixels files

This ensures that the pixel file ordering is consistent, and prevents
the errors seen in https://github.com/openmicroscopy/bioformats/pull/579
merge dev_4_4 -D org -I include -E exclude: PR 549 (Zeiss LSM: use the longer display channel name)
merge dev_4_4 -D org -I include -E exclude: PR 579 (CellSens: do not set the resolution count)
merge dev_4_4 -D org -I include -E exclude: PR 580 (Zeiss ZVI: ignore invalid plane coordinates (rebased onto dev_4_4))
merge dev_4_4 -D org -I include -E exclude: PR 581 (SEQ: do not automatically pick up files with the .seq suffix (rebased onto dev_4_4))
merge dev_4_4 -D org -I include -E exclude: PR 584 (Update auto-generated documentation)
merge dev_4_4 -D org -I include -E exclude: PR 586 (CellSens: sort arrays of pixels files)