[FEATURE] Error level as the first column in BE Log module

[FEATURE] Error level as the first column in BE Log module

Move error level (warning, error, ...) to first column
in BE to help catch the importance of the row.

Change-Id: I05f05b830cc92bddfb13126d0fe4826995783bc8
Resolves: #33816
Releases: 4.7
Reviewed-on: http://review.typo3.org/3170
Reviewed-by: Philipp Gampe
Tested-by: Philipp Gampe
Reviewed-by: Stefan Neufeind
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Jigal van Hemert
Tested-by: Jigal van Hemert