bugfixes and project slider

...src/components/graphs/LinearProgress/linear-progress.scss

client/src/components/layout/ProjectsSlider/index.tsx

...src/components/layout/ProjectsSlider/projects-slider.scss

client/src/components/navigation/Dropdown/dropdown.scss

client/src/components/navigation/Navigation/index.tsx

client/src/components/navigation/Sidebar/sidebar.scss

client/src/components/ui/ProjectSlide/index.tsx

client/src/components/ui/ProjectSlide/project-slide.scss

client/src/index.scss

client/src/pages/Introduction/index.tsx

client/src/pages/Introduction/intro.scss

client/src/pages/Projects/index.tsx

client/src/pages/Tasks/TaskStart/index.tsx

client/src/pages/Tasks/index.tsx

client/src/pages/Tasks/tasks.scss

client/src/pages/Teams/index.tsx

client/src/pages/Teams/teams.scss