[TASK] Replace typo3- specific CSS Classes with Bootstrap

All custom typo3-classes (typo3-red, typo3-dimmed) are replaced
with bootstrap alternatives. Through that, some PHP Tree classes
don't need to overload the method anymore from the AbstractTreeView
and are removed.

Resolves: #67994
Releases: master
Change-Id: Ie95b70e9b402a7a66eb6c5a2dbe2e2a87c96c5aa
Reviewed-on: http://review.typo3.org/41012


Reviewed-by: Benjamin Mack <benni@typo3.org>
Tested-by: Benjamin Mack <benni@typo3.org>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>