The ornamental design for a display mount, as shown and described.
FIG. 1 is a perspective view of a display mount showing my new design;
FIG. 2 is another perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof;
FIG. 9 is an enlarged view of portion 9 shown in FIG. 1; and,
FIG. 10 is an enlarged view of portion 10 shown in FIG. 2.
The evenly dashed broken lines in the drawings depict portions of the display mount that form no part of the claimed design. The dash-dot broken lines encircling portions of the claimed design that are illustrated in enlargements form no part of the claimed design.