Velocities: Strange behavior when moving first node

[kmatheussen]

1. Start Radium
2. Add C-5 add line 1.
3. Add D-5 add line 5.
4. Add a velocity note to the second note, for instance at line 8
5. Try to move the first velocity node various places for the D-5 note.
6. Strange things happens.

[kmatheussen]

fixed