Would make sense to have computer keyboard velocity setting it in top bar or somewhere else always visible, since it affects velocity in all tabs and not just in pattern editor.
+1 just noted this also. I have no midi input equipment and it would be nice to adjust this while fondling my precious keyzones. 
–EDIT:
Well. Just diverted the thing by making my shortcuts for +1/-1 keyboard velocity to display current value in status bar. But I see this a valid request anyway.