How can I make the KendoMaskedTextBox for Vue bind with v-model against the unmasked value? For example, if my mask is "00000-0000" for a US postal code, and I enter "30157" in the control, it will currently bind "30157-____". I need it to bind as "30157" (no hyphen, and no underscores). I could strip out what I don't want on the server, but it seems like that shouldn't be necessary.