* Added "watch-scss" job to qx.Mobile Showcase.
[BUG #7047] Switch from LESS to SCSS/SASS 


* Update of qx.Mobile theming documentation.
Added the platform type as a CSS class into Mobile's root div, for being able to react on platform specific CSS bugs.
UI Test fix
Fix qx.Mobile ToggleButton Tests
[BUG #7047] Switch from LESS to SCSS/SASS 


* Improved customization possibility of Slider widget, with qx.Mobile SCSS default theming.
* Refactoring of qx.Mobile Slider