v6 comboboxes default to displaying up to 30entries and give a bad user experience in LiveCD where we usually have low vertical screen resolution. Therefore limit the height of the expanded boxes to bring us close to how they were drawn before 0.4.12-dev-882-g e3e173ffaafbccb0e9b52926d41626d5a4dc38cd Adding CBS_NOINTEGRALHEIGHT gives similar result for both: comctl32 v5 and v6 comboboxes. Similar commit for bootcd CORE-16252 went into 0.4.13-dev-740-g 8b67edd8fa2b51d7d5a710e8867123246b72f524