[TASK] Cleanup "belog" sysext

Reformats the code, fixes indents and removes extra empty lines. This is
not a functional change but a visual clean up.

Change-Id: I0d11dd7c43eee5d181c4bc0565c85d651c5c29e1
Resolves: #45392
Releases: 6.0, 6.1
Reviewed-on: https://review.typo3.org/18207
Reviewed-by: Stefan Neufeind
Reviewed-by: Oliver Hader
Tested-by: Oliver Hader
[TASK] Cleanup "beuser" sysext

This is a non-functional change that reformats the code, removes
unnecessary empty lines and fixes namespaces in phpDoc. In addition
the following to changes are made:
- add $GLOBALS['TYPO3_DB']->sql_free_result() calls to free some memory
- change bu:SpriteIconForRecord to bu:spriteIconForRecord in templates

Change-Id: I6e832921c46f828c9db0c796d662bd8390b5ac5f
Resolves: #45343
Releases: 6.0, 6.1
Reviewed-on: https://review.typo3.org/18190
Reviewed-by: Oliver Klee
Reviewed-by: Markus Günther
Tested-by: Markus Günther
Reviewed-by: Stefan Neufeind
Reviewed-by: Oliver Hader
Tested-by: Oliver Hader