[BUGFIX] Streamline wording for clipboard section of list module

This patch adds correct wording for the clipboard section of the
list module.

Clipboard entries are called "elements". Along with "Copy elements"
and "Move elements", the remaining buttons must also be named
identically to improve the user interface in this area.

Therefore the button to remove a single element from clipboard is
named from "Remove item" to "Remove element".

Resolves: #100044
Releases: main
Change-Id: I872d0851d3d11359e454e33cfb1670233d335058
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77979


Tested-by: core-ci <typo3@b13.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>