[TASK] Convert dropdowns in clipboard to TWBS

[TASK] Convert dropdowns in clipboard to TWBS

This patch converts the dropdowns in the clipboard from select options to
ul li list to follow the TWBS guidelines.

Releases: master
Resolves: #67560
Change-Id: Ic1f3d769170a59b0217198030c9ef30aa9a5124a
Reviewed-on: http://review.typo3.org/40362
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Andreas Wolf <andreas.wolf@typo3.org>
Tested-by: Andreas Wolf <andreas.wolf@typo3.org>
Reviewed-by: Alina Fleser <afleser@arxia.com>
Tested-by: Alina Fleser <afleser@arxia.com>