Alerts: More >99 days before / after due date

I observed that under Alert, it is not possible to warn >|99| days because the input field is limited to three symbols. Together with +/- I can define max. 99 days before/after the due date.  




In the software sales business it is normal that the renewal process starts 6 months before due date. Here I created a License Database System with all sold licenses as tasks. In order to create an alert for all sales reps, we need to create alerts 6 months before the due date.

Could you please add another available digit (total: 4) in the input field "Warn [_ _ _ _] days (+) ..."?