3321 PO 4) Change button between "Assign" and "Switch to" depending on current reviewer

view/src/main/java/se/su/dsv/scipro/admin/pages/AdminAssignReviewerPage.java

@@ -207,6 +207,13 @@ public class AdminAssignReviewerPage extends AbstractAdminProjectPage {
         private class AssignReviewerLink extends Link<User> {
             public AssignReviewerLink(String id, IModel<User> reviewer) {
                 super(id, reviewer);
+                setBody(AvailableReviewersPanel.this.getModel().map(project -> {
+                    if (project.getReviewer() == null) {
+                        return "Assign";
+                    } else {
+                        return "Switch to";
+                    }
+                }));
             }
 
             @Override