aria implementation

...degree-planner/course-search/course-search.component.html

...logs/modify-plan-dialog/modify-plan-dialog.component.html

...-planner/dialogs/notes-dialog/notes-dialog.component.html

...-planner/dialogs/notes-dialog/notes-dialog.component.scss

...-later-container/saved-for-later-container.component.html

...ree-planner/shared/course-item/course-item.component.html

...lanner/sidenav-menu-item/sidenav-menu-item.component.html

...gree-planner/term-container/term-container.component.html

...gree-planner/year-container/year-container.component.html

...shared/dialogs/prompt-dialog/prompt-dialog.component.html

src/assets/sass/general.scss