What is the ruling on a woman observing 'iddah (waiting period) after her husband's death constantly looking in the mirror?

Looking in the mirror is permissible for a woman observing the 'iddah (waiting period) after her husband's death. However, she is prohibited from anything considered an adornment, whether by religious law or custom, such as going out without necessity, being exposed to proposals of marriage, applying kohl, using perfumes, wearing dyed clothes, and adorning herself with gold, silver, or jewels. As for removing dirt from clothes and the body, that is permissible.