The ornamental design for a lidholder, as shown and described.
FIG. 1 is a front, bottom, and right perspective view of a lid holder in accordance with the new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a left side elevational view thereof;
FIG. 8 is a perspective view thereof in a use configuration with environment of a pot;
FIG. 9 is a perspective view thereof in a use configuration with environment of a pot and a lid; and,
FIG. 10 is a perspective view thereof in a use configuration with environment of a pot and a utensil.
The broken lines in FIGS. 1-10 and the unshaded surfaces adjacent to them depict portions of the lid holder that form no part of the claimed design. The dot-dash-dot broken lines in FIGS. 8, 9, and 10 depict environment that forms no part of the claimed design.