The ornamental design for a controllever, as shown and described.
FIG. 1 is a front elevation view of the control lever of my new design.
FIG. 2 is a right side elevation view thereof.
FIG. 3 is a back elevation view thereof.
FIG. 4 is a left side elevation view thereof.
FIG. 5 is a top plan view thereof.
FIG. 6 is a top right front perspective view thereof.
FIG. 7 is a top left front perspective view thereof.
FIG. 8 is a front bottom perspective view thereof; and,
FIG. 9 is a rear bottom perspective view thereof.
The dashed line elements are included for the purposes of illustrating unclaimed portions of the structure of the control lever and form no part of the claimed design. The bottom surface of the control lever grip, as shown in FIGS. 8 and 9, is unclaimed.