[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: #77069
Releases: master, 8.7
Change-Id: Iacba62543b036309e17828ab86f1986eb65f36a0
Reviewed-on: https://review.typo3.org/52997


Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>