Made the show combox provide options to choose from - All, food or other

src/main/java/no/ntnu/idatt1002/demo/controller/ExpensesController.java

@@ -73,6 +73,10 @@ public class ExpensesController {
 
   @FXML
   public void initialize() {
+    ObservableList<String> filter = FXCollections.observableArrayList("All", "Other", "Food");
+    show.setItems(filter);
+    show.setValue("All");
+
     dateColumn.setCellValueFactory(new PropertyValueFactory<Expense, String>("date"));
     amountColumn.setCellValueFactory(new PropertyValueFactory<Expense, Double>("amount"));
     categoryColumn.setCellValueFactory(new PropertyValueFactory<Expense, ExpenseCategory>("category"));
@@ -80,8 +84,7 @@ public class ExpensesController {
     recurringColumn.setCellValueFactory(new PropertyValueFactory<Expense, Boolean>("recurring"));
     expenseTableView.setItems(expenses);
 
-    ObservableList<String> filter = FXCollections.observableArrayList("All", "Other", "Food");
-    show.setItems(filter);
+
   }
 
   @FXML