[!!!][CLEANUP] Move t3-table and t3-button to bootstrap

- Drop crontrib normalize css in favor of bootstrap normalize
- Drop .t3-table use bootstrap classes instead
- Drop .t3-button use bootstrap classes instead
- Use comments with // that are protected from compiling
- Lighten default button color
- Move Extension Manager SCSS files to t3skin LESS
- Remove copyrights from every included less file
- Remove TYPO3/visual/_module_web_list.less not used anymore
- Remove TYPO3/visual/_module_web_info.less not used anymore
- Add Legacy Support javascript for t3-table

This patch aims to reduce CSS size and remove duplicated
css definitions as much as possible. It may break some stuff
that needs to be cleaned up in a followup.

We need to drop .t3-table and .t3-button to reduce weight of the
css file and make overrides more easy.

Resolves: #64102
Releases: master
Change-Id: Id6195b5aa10984da22af83fdb175af1e286d67d8
Reviewed-on: http://review.typo3.org/35763


Reviewed-by: Mathias Schreiber <mathias.schreiber@wmdb.de>
Tested-by: Mathias Schreiber <mathias.schreiber@wmdb.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>