The ornamental design for a mobile scaffoldskidbar, as shown and described.
FIG. 1 is a perspective view of a mobile scaffold skid bar showing my new design. The broken lines are for illustrative purposes only and form no part of the claimed design.
FIG. 2 is a perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a rear elevation view thereof; and,
FIG. 7 is an end elevation view thereof, the opposite end being a mirror image thereto.