fix(web-app-files): use sticky header composable in deleted files #13329
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Description
The sticky header composable is now used in the deleted files view. This fixes the issue where the header was always sticky. On smaller screens, this breaks the layout and overlaps the content.
Motivation and Context
Consistent behaviour with other tables.
How Has This Been Tested?
Screenshots (if appropriate):
Zaznam.obrazovky.2025-11-21.v.11.17.19.mov
Zaznam.obrazovky.2025-11-21.v.11.18.21.mov
Types of changes