<select> items and maskAllInputs

[eoghanmurray]

Recreating the current selection of a dropdown currently relies on the value of the selected text. If maskAllInputs: true is on, then when the select dropdown is changed by the website visitor, there is no valid to match the IncrementalSource.Input value of e.g. ******** How to best fix? should the selectedIndex also be stored in the event, and that be used to replay/show the new value or should we disable masking on dropdowns, even in the presence of the maskAllInputs: true setting

I should be able to provide the latter fix.

[eoghanmurray]

See also #195