The ornamental design for a controlpad, as shown and described.
FIG. 1 is a front perspective view of a control pad;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The dashed-dot-dashed broken lines represent the bounds of the claimed design, while the evenly spaced dashed broken lines shown in the drawings depict portions of the control pad that form no part of the claimed design.