Opening one collapsible column field causes it's neighbor to disappear because they are bottom aligned.

[Jeremy-Logan]

Describe the bug

If you have multiple long collapsible column fields and you open one the others disappear off the bottom of the window.

To Reproduce

Steps to reproduce the behavior:

1. Create an object with 2 columns.
2. Fill the columns with enough data to cause the first column to run off the page when not collapsed.
3. Open column 1 and notice that column two seems to have disappeared.
4. Scroll to the bottom of column 1 and notice that column two is hiding next to the bottom of column 1.

Expected behavior

The column dropdowns should be aligned to the top so when one is open the other is still visible

Screenshots

Which versions of Sanity are you using?

@sanity/cli (global) 3.46.0 (up to date) @sanity/image-url 1.0.2 (up to date) @sanity/ui 2.3.3 (up to date) sanity 3.46.0 (up to date)

What operating system are you using? Windows

Which versions of Node.js / npm are you running?

Node: 18.18.0 npm: 10.2.5

Additional context