[BUGIFX] Missing argument in EM List view VH

Due to a careless backport, the EM List view now calls on the
\TYPO3\CMS\Fluid\ViewHelpers\Be\Buttons\IconViewHelper VH
without the required "uri" argument, causing the List view
to crash.

Resolves: #51585
Releases: 6.0, 6.1
Change-Id: I8c96bbe783ea9713e2ca5a2434854e653c2f01d4
Reviewed-on: https://review.typo3.org/23493
Reviewed-by: Francois Suter
Tested-by: Francois Suter
Reviewed-on: https://review.typo3.org/23494