add delete expense prompt
Revert "Add two sliding buttons to each item"

This reverts commit d941d4d7c95f91cf2bb3d6240461aef163c094b3.

Decided that it would be too much trouble dealing with this
toolbar below each expandable item. Decided to make a separate
activity that will pop-up upon clicking on the item of the
expandable list view.

- revert the commit that makes the toolbar with edit and delete
buttons
- remove all of animation classes and everything else that went
with it.