[TASK] Remove <table> in lowlevel configuration

EXT: lowlevel brings a tree view to display configurations.
This configuration has been wrapped into a <table> tag in
order to prohibit wrapping of long lines.

Removes <table> tag and brings nowrap replacement.
Also moves headline to pole position.

Change-Id: I0358c90cd890101e5e8f7b8d4056d4e8a571d8ee
Resolves: #49743
Releases: 6.2
Reviewed-on: https://review.typo3.org/22042
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Max Roesch
Tested-by: Max Roesch
Reviewed-by: Markus Klein
Tested-by: Markus Klein