API DOC
[BUG #7047] Switch from LESS to SCSS/SASS 


* Refactoring of ToggleButton (removed additional composite inside of ToggleButton)
* Refactoring ToggleButton SCSS for much easier handling of iOS and Android
* Extracted Application's font, and Application's default font color as variable to qooxdoo's custom theming.
[BUG #7047] Switch from LESS to SCSS/SASS 


* Refactoring of ToggleButton (removed additional composite inside of ToggleButton)
* Refactoring ToggleButton SCSS for much easier handling of iOS and Android
* Extracted Application's font, and Application's default font color as variable to qooxdoo's custom theming.