ROENROLL-1369 Improve feel and look of drag and drop functionality

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

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

...or-later-container/saved-for-later-container.component.ts

...egree-planner/shared/course-item/course-item.component.ts

src/app/degree-planner/store/actions/course.actions.ts

src/app/degree-planner/store/effects/course.effects.ts

src/app/degree-planner/store/reducer.ts

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

...degree-planner/term-container/term-container.component.ts

src/assets/sass/general.scss