[BUGFIX] Avoid jumping of form fields on focus

Use absolute position for hints of remaining
characters to prevent form fields from being
moved down.

Resolves: #81447
Related: #77069
Releases: master, 8.7
Change-Id: I8df8cd25955a6ed44bfa5ee727f439856960167f
Reviewed-on: https://review.typo3.org/53069


Reviewed-by: Mona Muzaffar <mona.muzaffar@gmx.de>
Tested-by: Mona Muzaffar <mona.muzaffar@gmx.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>