Make sure comboboxes can work even if accept or cancel not fired

[bhousel]

It's possible to skip the accept or cancel event when using a combobox if the user selects a value with the arrow keys, but then clicks off the combo and blurs the field.

Most of the time, it's no big deal - but in some situations we have code that really expects to validate the combobox and replace its value:

d0021f7 fixes this issue for the brand suggestion preset combo
49442af fixes this issue for the raw member editor relation combo