Disable no composite optimisation when bumping.
Misc BigBED fixes for GRC track.
Fix bumping for unsorted BigBED features.
Clickable labels.
Allow clicks on full label.
Fix showing "all" align features.
Fix rendering of methylation track zmenus.
Fix label clicking ZMenus in _alignment.
Explicitly zero depth (compact) override user conf.
Sanitize to support br in clean_strict.