Reset drag over state on course drop.

src/app/degree-planner/saved-for-later-container/saved-for-later-container.component.ts

@@ -51,6 +51,8 @@ export class SavedForLaterContainerComponent implements OnInit {
     const fromTerm = previousContainerId.indexOf('term-') === 0;
     const fromDifferentContainer = newContainerId !== previousContainerId;
 
+    this.hasItemDraggedOver = false;
+
     if (fromDifferentContainer && fromTerm) {
       const course = event.item.data as Course;
 

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

@@ -225,6 +225,8 @@ export class TermContainerComponent implements OnInit, OnDestroy {
       course => course.courseId === courseId,
     );
 
+    this.hasItemDraggedOver = false;
+
     if (newContainer !== previousContainer && isCourseInPlannedCourses) {
       this.dialog
         .open(ConfirmDialogComponent, {