[BUGFIX] Give Record browser more UX space

[BUGFIX] Give Record browser more UX space

The Record Browser (modal popups) wastes a
lot of space, and is not in line with the
rest of the TYPO3 Backend UX.

This patch fixes various issues regarding
- Trees do not have headlines anymore
- Filter box is simpler
- Icon is aligned with text next to it

Resolves: #87043
Releases: master
Change-Id: I9f7592912c4677e723e6662ccf0965940898083e
Reviewed-on: https://review.typo3.org/58984
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>