The ornamental design for a electronicmouse, as shown and described.
FIG. 1 is a front perspective view of a electronic mouse showing my new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is front view thereof; and,
FIG. 6 is a rear view thereof.
The unshown bottom forms no part of the claimed design. The broken line showing of various regions and the unshaded areas there within form no part of the claimed design.