The ornamental design for a displayshelf, as shown and described.
FIG. 1 is a front perspective view of the design according to an embodiment;
FIG. 2 is a front elevation view of the design of FIG. 1;
FIG. 3 is a rear elevation view of the design of FIG. 1;
FIG. 4 is a left side view of the design of FIG. 1;
FIG. 5 is a right side view of the design of FIG. 1;
FIG. 6 is a top view of the design of FIG. 1; and,
FIG. 7 is a bottom view of the design of FIG. 1.
The solid lines shown in the drawings illustrate features of the article that form part of the claim. The broken lines shown in the drawings illustrate feature of the article that form no part of the claim.