Epic #62041: twbs Bootstrap backend, refactor EXT:t3skin and HTML5 output
Restructure t3skin CSS to Less
Make use of Less hierarchy and constraints.
Also use Bootstrap less variables for "Visual" layout.
[FEATURE] Refactor EXT: t3skin CSS to Less & variables
Make use of Less hierarchy and constraints. Dissolves "visual" and
"structure" folders in order to use Less variables for "Visual"
layout at a later point.
+ moves Less files
+ merges visual and structure sub-folders
+ merges several CSS classes into hierarchical format.
Patch explicitly does not yet:
+ refactor CSS definitions
+ removes duplicated CSS definitions
+ make use of Bootstrap where applicable.
Layout in the backend before and after this patch does not change.
Reviewed-by: Georg Ringer <firstname.lastname@example.org>
Tested-by: Georg Ringer <email@example.com>
Reviewed-by: Wouter Wolters <firstname.lastname@example.org>
Tested-by: Wouter Wolters <email@example.com>