Bugfix remove Refund payment with refunded payment

+ hide the add row for student/parent profiles
Add #selectedModuleLink

To highlight the selected Module Link in the side Menu
Bugfix Currency direct call via $extra['functions']

- Negative number displayed correctly
Reset $email_column variable
Add .br-after class to Side.php input fields

- Removed line breaks
- Allow on line display of the inputs
- updated WPadmin theme
Bugfix SQL bug column "None" does not exist

Fix #43
- changed "None" for 'None'