[PDP] fix z-issue and bug with renaming (#753)

Author: aking526

frontend/degree-plan/components/FourYearPlan/DegreeModal.tsx

@@ -260,8 +260,7 @@ const ModalInterior = ({
               if (
                 modalObject &&
                 "id" in modalObject &&
-                "name" in modalObject &&
-                "degrees" in modalObject
+                "name" in modalObject
               ) {
                 updateDegreeplan({ name }, modalObject.id);
                 if (modalObject.id == activeDegreePlan?.id) {

frontend/degree-plan/components/FourYearPlan/SelectListDropdown.tsx

@@ -194,7 +194,7 @@ const DropdownMenu = styled.div<{$isActive: boolean}>`
     padding-top: 4px;
     position: absolute;
     top: 100%;
-    z-index: 200000;
+    z-index: 1000;
     font-size: 1rem;
 `;