Created the logic to remove an expense. Concentrated the method to add/remove an expense into two methods
Fixed a bug when the user clicks on the cancel button of the action mode. It did not close the drawer. Remove the part which changes the action bar title when the right drawer is open. Since the app is using the action mode, it is not necessary to do it.
Assigned correctly the done button when there is some error saving the expense. Created a simple method to edit the expense. Not finished yet.