[BUGFIX] Update ColorPicker to use cleaned minicolors hex value

Force ColorPicker to use the formatted/cleaned value jQuery's minicolors
produces instead of just displaying it but still saving the raw value
the user inputs.

Resolves: #87031
Releases: master, 9.5
Change-Id: I49d9f094961137ae50561475d5421f536b705c70
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/59052


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Henrik Elsner <helsner@dfau.de>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Henrik Elsner <helsner@dfau.de>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>