Fix scrolling on Application > Snapshots page

### Description

On the Application > Snapshots page, the entire page (including filters and table header) scrolls together with the data. Update the layout so that filters and the table header remain fixed, and only the datatable entries (table body) scroll.

### Epic/Story

_No response_

### Have you provided an initial effort estimate for this issue?

I have provided an initial effort estimate

Start at the Application > Snapshots page and trace the page layout and datatable components responsible for the filters, table header, and entries. Done means the filters and table header remain fixed while only the datatable body scrolls.

Written by the indexing model from the issue text.