The ornamental design for a jackcover, as shown and described.
FIG. 1 is a top perspective view of the jack cover embodied in the present invention;
FIG. 2 is a right side view of the jack cover from FIG. 1;
FIG. 3 is a left side view of the jack cover from FIG. 1;
FIG. 4 is a front view of the jack cover from FIG. 1;
FIG. 5 is a back view of the jack cover from FIG. 1;
FIG. 6 is a top view of the jack cover of FIG. 1; and,
FIG. 7 is a bottom view of the jack cover of FIG. 1.
The dash-dash-dash type broken line shown in FIGS. 1 through 5 corresponds to stitching on the design.
The dash-dot-dash type broken line shown in FIG. 1 is included for the purpose of illustrating environmental context and forms no part of the claimed design.