This fixes the small annoyance when expanding an item in the
TypoScript Object Browser and the iframe reloads and scrolls to the
expanded item while the doc-header hides this item. CSS scroll-padding
solves this problem for modern browsers.

Resolves: #89217
Releases: master,9.5
Change-Id: If4b71c7fb6ba003b23cdd79460540f0bf335abb8
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61770


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Frank Nägler <frank.naegler@typo3.org>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Frank Nägler <frank.naegler@typo3.org>

In preparation for upcomming switch from bootstrap to SASS the backend
style sources have been migrated to SASS. The autoprefixer configuration
was corrected to match CMS8 LTS requirements and minification of CSS
files is now enabled. Automatic style checks are now available through
grunt. The tasks `grunt format` and `grunt lint` will now check sources
files for consistency.

Resolves: #80453
Releases: master
Change-Id: I9ba23aea78014a1f0cce229db533a81d5ffcd02f
Reviewed-on: https://review.typo3.org/52151


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Marco Christian Krenn <krenn@webconsulting.at>
Tested-by: Marco Christian Krenn <krenn@webconsulting.at>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>