Two small separate issues here (1) and (2):
### What?
1. Excess margin is displayed when a row is hidden due to
`admin.condition`
2. The `admin.style` props is never passed to the `row` field
### Why?
1. Unlike other fields, the `row` field still gets rendered when
`admin.condition` returns false - this is because the logic gets passed
down to the fields within the row
2. `style` was never being threaded to the `row` field wrapper
### How?
1. Hides the row using css to `display: none` when no children are
present
2. Passes `admin.styles` to the `row` wrapper
Fixes#11477
6699844d7b