Sleeping with the big mittens on

When someone is finally resting or accepting a situation, after they've been fighting it. (Based on their use on hospital patients, who may be fighting to pull out IVs or foleys, and so they put "big mittens" on their hands so they can't hurt themselves, and they finally fall asleep.")

"Is your friend still suing their landlord to get their deposit back?" "No, she's decided to let it go. She's sleeping with the big mittens on."