Is there a way to set the width of the modal windows?

[abhlabs]

I'm running into issues trying to squeeze too much text into the space allocated by the ModalSettingsTile on small devices. There seems to be plenty of screen space to made the window wider -- the device is 320 px wide, but the modal window is only 240 wide. If I could get another 30 px I'd be set. Is there a way to do that?