The ornamental design for an electronic displaycabinet, as shown and described.
FIG. 1 is a left perspective view of an electronic display cabinet, showing my new design;
FIG. 2 is a right perspective view thereof; and
FIG. 3 is a left perspective view with the front cabinet door in the open position thereof; and,
FIG. 4 is a perspective view with the cabinet door in the closed position.
The rear of the furniture is substantially unadorned and does not form a part of the claim. In the drawings, the broken lines show portions of the furniture and form no part of the claim design.