Combo box issue.
Please, I would like your help with the following.
I have a simple combo described bellow, for YES/NO values.
The issue is that the user can type anything in the field.
Does the combo works this way? or can I do something to limit the values to YES/NO.
It seems not very clean that the user can type on the field.
It should only allow to select the values provided in the combo.
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