Input:Select.Dialog: Delete default option. Value still existing

[AndreasT]

Hi, i found a bug in the input select Dialog.

Steps:

1. Click on input select
2. Dialog: add some options
3. Set one added option as default
4. The default Value is now visible in "Value" field (under the "Name" field)
5. Delete the previously setted default option.

=> 6. The value of the option which was deleted is still visible in the upper "Value" field.

Expected Behaviour: => value in field "Value" should be removed on deleting the default option.

Note: However if you open the dialog again (contextMenu edit selection). The value in "Value" field is removed.

So the broken behaviour is only on creating a new selection.