The ornamental design for a dressingtable, as shown and described.
FIG. 1 is a perspective view of a dressing table showing the design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The broken lines showing portions of the bottom features of the dressing table are included for the purpose of illustrating environment and form no part of the claimed design.