[BUGFIX] Language-module icons need to display in correct size

Since inline:display-block was missing on those icons, those
icons didn't display in their intended size although they
had a width/height-attribute set.

Change-Id: I5ba318e6a3ca4602714d0c4b5f12674e2e305952
Resolves: #43428
Releases: 6.2, 6.1, 6.0
Reviewed-on: https://review.typo3.org/23178
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring
[TASK] FilesContentObject::stdWrapValue(): only execute stdWrap once

Change-Id: I4bad84460e1d1b16e05498e382644cd5946c3be8
Resolves: #50614
Releases: 6.2, 6.1, 6.0
Reviewed-on: https://review.typo3.org/23180
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind