Make sure we proplerly edit created chips.

We need to edit the created chips before the text is changed so that we
don't count the existing "," when deleting

Also, make sure to move chips that are being edited as text to the end
of the field
Fixes b/7547813 When I try to delect an email address for each charater, it blocks automatically again.

Change-Id: I60661945b75ab0f4ffbb04e71971d16e2900c26c