I claim the ornamental design for a glide plate, as shown and described.
FIG. 1 is an environmental perspective view of a glide plate according to an embodiment of the invention and showing the glide plate attached to a motorbike; the structure of the motorbike shown in broken lines forming no part of the claimed design;
FIG. 2 is an enlarged front view of the glide plate;
FIG. 3 is an enlarged left side view of the glide plate;
FIG. 4 is an enlarged back view of the glide plate;
FIG. 5 is an enlarged right side view of the glide plate;
FIG. 6 is an enlarged back end view of the glide plate; and,
FIG. 7 is an enlarged front end view of the glide plate.