Fixed home, milestone anc challenge page to be more intuitive, did define cursors and displayed more info for smaller components.

Did some layout changes to home view. Implemented help-pop up and list of active milestones. Did also make the page more similar to other pages.

Added help pop-up to the discover view. Did also do some layout changes to make the page more scalable.

Abstracted all main content into different components. Did some layout changes to make the page more scalable. Added help-icon for pop up.