afernandez authored Dec 23, 2020 and bfr committed Jan 04, 2021

With Bootstrap 5, <select> fields make use of the class `form-select`.
This patch aims to replace every occurrence of `form-control` used with
select fields. Since Bootstrap finally brings proper styling for select
boxes, the custom implementation rendering chevrons can be removed.

In the same run, the `input-$size` classes are migrated to its new class
names and some obsolete classes have been removed.

Resolves: #93135
Releases: master
Change-Id: I0044127cc380bddfbaec0b9f730123959f7288bd
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/67247


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Martin Kutschker <mkutschker-typo3@yahoo.com>
Tested-by: Benjamin Franzke <bfr@qbus.de>
Reviewed-by: Martin Kutschker <mkutschker-typo3@yahoo.com>
Reviewed-by: Benjamin Franzke <bfr@qbus.de>