The ornamental design for a footplate, as shown and described.
FIG. 1 is a perspective top front view of an embodiment of a foot plate showing my new design;
FIG. 2 is a perspective top front view thereof, showing a power tool handle and power tool inserted in the power tool handle, attached to the foot plate;
FIG. 3 is a front side view of the embodiment of FIG. 1;
FIG. 4 is a top view of the embodiment FIG. 1;
FIG. 5 is a bottom view of the embodiment FIG. 1;
FIG. 6 is a left side view of the embodiment FIG. 1;
FIG. 7 is a right side view of the embodiment FIG. 1;
FIG. 8 is a back side view of the embodiment of FIG. 1; and,
FIG. 9 is a perspective top back view of the embodiment of FIG. 1.
The broken lines shown in the drawings illustrate portions of the foot plate and environmental structure that forms no part of the claimed design.