required fields not marked with asterisk

on admin/user/profile/add/picture
if you do not enter a value for the fields for

Maximum size of uploaded image (in KiB, zero if none):

and

Maximum dimensions of uploaded image (WxH, in pixels):

there is an error. Neither of these fields is marked with an asterisk to indicate that they are required.

Suggest to mark with asterisk and if possible, pre-fill both fields with 'suggested' default values that will validate if submitted unchanged.