AT:
- in the variable filter for numeric variables:
	- if I have just one input field, it is not possible to remove it
- if I have more than just one input field, I can remove any of them by clicking on an x button next to the input fields
- the add value button is always shown
 
Context:
- Given
	- Open the Add Variable Filter modal
- Enter two values
 
- When
	- I delete one variable value (because I've entered the value by accident)
 
- Then
	- the corresponding value input field is still existing and expects a value
 
- Problem
	- It is not possible to continue after removing a variable
 
The same problem appears when I select 'Add Value' by accident. The filter expects that I enter a new value. There is no chance to undo this action.