The ornamental design for a supportivepad for a computer mouse, as shown and described.
FIG. 1 is a top, left, rear perspective view of a supportive pad for a computer mouse;
FIG. 2 is a top plan view of the supportive pad for a computer mouse of FIG. 1;
FIG. 3 is a bottom plan view of the supportive pad for a computer mouse of FIG. 1;
FIG. 4 is a rear elevational view of the supportive pad for a computer mouse of FIG. 1;
FIG. 5 is a front elevational view of the supportive pad for a computer mouse of FIG. 1;
FIG. 6 is a left side elevational view of the supportive pad for a computer mouse of FIG. 1; and,
FIG. 7 is a right side elevational view of the supportive pad for a computer mouse of FIG. 1.
The broken and/or phantom lines depicting the computer mouse and wire are for showing environmental structure only and form no part of the claimed design, but are provided to illustrate the design when the support pad for a computer mouse is tethered to a computer mouse.