[FOLLOWUP][TASK] Replace sprite icon "actions-document-paste-into" with IconFactory

The Icon class is not being referenced by fully qualified name and
needs to be imported.

Resolves: #68964
Related: #68865
Releases: master
Change-Id: I6b27199b1ee83a0cdb6075bdcbe46f2d88fcaf15
Reviewed-on: http://review.typo3.org/42531


Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Daniel Maier <dani-maier@gmx.de>
Tested-by: Daniel Maier <dani-maier@gmx.de>
Reviewed-by: Frans Saris <franssaris@gmail.com>
Tested-by: Frans Saris <franssaris@gmail.com>