(WARNING: DO NOT MERGE UNLESS REVIEWED)
(When developing, stay in the develop branch. Only merge to master when everything is reviewed and there are no bugs.)
Added option to use default directory or set new path
Replaced more familiar icons and terms in main menu
Made separate pages for courses, presentation and settings
(WARNING: DO NOT MERGE UNLESS REVIEWED) (When developing, stay in the develop branch. Only merge to master when everything is reviewed and there are no bugs.)