The ornamental design for a switchplate, as shown and described.
FIG. 1 is a top front side perspective view of a switch plate showing our new design;
FIG. 2 is a front view of the switch plate;
FIG. 3 is a right side view of the switch plate, a left side view being a mirror image thereof; and,
FIG. 4 is a top view of the switch plate, a bottom view being a mirror image thereof.
The rear view is not ornamental and forms no part of the claimed design. The broken lines inside the outside connectors illustrate structure forming no part of the claimed design.