Hs fix piecharts

• Make pie-charts at Income and Expense display the categories that are present in the tables.
• Make the labels display in larger font and bold.
• Make the packages "economy" and "budget" lower-case.

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

@@ -10,8 +10,8 @@ import javafx.scene.control.ComboBox;
 import javafx.scene.control.TextField;
 import javafx.scene.text.Text;
 import javafx.stage.Stage;
-import no.ntnu.idatt1002.demo.data.Budget.BudgetItem;
-import no.ntnu.idatt1002.demo.data.Economics.ExpenseCategory;
+import no.ntnu.idatt1002.demo.data.budget.BudgetItem;
+import no.ntnu.idatt1002.demo.data.economics.ExpenseCategory;
 
 /**
  * Class that represents the popup dialog box that appears