Neat.
Rather off topic, thinking about using your portable hole sheet for my gnome battlemaster, I realized how I can set up the inventory bits of the character app I'm very leisurely working on.
What springs to mind is setting up an "gear at the ready" panel on the main screen with my basic details for the common weapons, armor, and various items that are accessible without rooting through a backpack or portable hole.
Then on a dedicated inventory screen, I can have separate panels for each sort of container, then just drag and drop the items from place to place as necessary.
Sweet. That actually solves a niggling design problem I've been struggling with. So thank you.
And nice work!