Redesigned scenes

...o/ntnu/idatt1002/demo/controller/AddBudgetController.java

.../ntnu/idatt1002/demo/controller/AddExpenseController.java

...o/ntnu/idatt1002/demo/controller/AddIncomeController.java

...a/no/ntnu/idatt1002/demo/controller/BudgetController.java

...in/java/no/ntnu/idatt1002/demo/controller/DialogMode.java

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

.../no/ntnu/idatt1002/demo/controller/FinanceController.java

...a/no/ntnu/idatt1002/demo/controller/IncomeController.java

...nu/idatt1002/demo/controller/IncomeExpenseController.java

...main/java/no/ntnu/idatt1002/demo/controller/MainMenu.java

...no/ntnu/idatt1002/demo/controller/MainMenuController.java

...va/no/ntnu/idatt1002/demo/controller/SceneController.java

src/main/resources/Economics/Income.register

src/main/resources/Images/add.png

src/main/resources/Images/budget.png

src/main/resources/Images/delete.png

src/main/resources/Images/edit.png

src/main/resources/Images/expense.png

src/main/resources/Images/income.png

src/main/resources/Images/incomeExpense.png