MKVToolNix GUI: bug fix: the file/track columns aren't resized to fit their content when expanding/collapsing tree nodes anymore. Such expansion also happened when moving entries with the "move up/down" buttons. Fixes #1492.
mkvmerge: bug fix: fixed the values of the "previous/next segment UID" elements when splitting by parts with segment linking enabled. Fixes #1497.
mkvmerge: bug fix: mkvmerge no longer creates a "next segment UID" field in the last file when splitting and segment linking is active.
mkvpropedit, MKVToolNix GUI header editor: enhancement: added the "codec delay" track header field as an editable property.
mkvmerge: bug fix: fixed an endless loop when updating track headers caused by the fix for "Re-rendering track headers: data_size != 0 not implemented yet". Fixes #1485.