organizational changes to handling gizmos:
GizmoUtility.ipf, put some general Gizmo Menu items here
split GizmoZoomTranslate.ipf into
GizmoZoomTranslate.ipf, GizmoClip.ipf, and GizmoMarkers.ipf
each one now handles its own menus
modified GizmoMovies.ipf, so that it works like the other Gizmo*.ipf files
changed GeneralFirst.ipf, so that it let's you load the above Gizmo*.ipf files separately.