[Task] Improve Mobile Responsiveness for Theme Modals

[tjtanjin]

Task Description:
The theme modals (shown upon clicking "more info" for a theme) are currently not mobile optimized. They exceed the device height, and ordering of elements are incorrect. This requires fixing.

Deliverable(s):
A mobile optimized view for the theme modal.

Additional Context:
There are no specific mobile designs for theme modal, but there's one for the profile theme which is a good reference: https://www.figma.com/design/oK12zZACqvlACoqkZIrtxV/Gallery-Website?node-id=2010-3190&t=vqvxac81sOgZD9Li-0