The ornamental design for a capshadeextender, as shown and described.
FIG. 1 is a top isometric view of a cap shade extender showing the connector and shading portion of the cap shade extender in a joined configuration;
FIG. 2 is a right side elevation view of the cap shade extender in a separated configuration; and,
FIG. 3 is a cross-sectional view taken from the lines 3-3 denoted in FIG. 1, shown in a separated configuration.
The portions of the cap illustrated by broken lines represents environmental structure that forms no part of the claimed design. The dash-dot-dash broken lines shown in FIG. 1 portrays the bounds of the enlarged detail view of FIG. 3.