Resolve ""Zweistufiger" Vollbildmodus"

resources/assets/javascripts/bootstrap/application.js

resources/assets/javascripts/bootstrap/fullscreen.js

resources/assets/javascripts/bootstrap/responsive.js

resources/assets/javascripts/bootstrap/sidebar.js

resources/assets/javascripts/lib/fullscreen.js

resources/assets/javascripts/lib/responsive.js

resources/assets/javascripts/lib/sidebar.js

resources/assets/stylesheets/scss/contentbar.scss

resources/assets/stylesheets/scss/courseware.scss

resources/assets/stylesheets/scss/header.scss

resources/assets/stylesheets/scss/index.scss

resources/assets/stylesheets/scss/layouts.scss

resources/assets/stylesheets/scss/responsive.scss

resources/assets/stylesheets/scss/sidebar.scss

resources/assets/stylesheets/studip.less

resources/assets/stylesheets/studip.scss

resources/vue/components/courseware/CoursewareRibbon.vue

...vue/components/courseware/CoursewareStructuralElement.vue

resources/vue/components/responsive/NavigationItem.vue

resources/vue/components/responsive/ResponsiveContentBar.vue