sup-heliotrope/sup — pull request #66 by 5long (2013-05-23 17:22:12+00:00)
Title: More Solid Account Selector

* Raise exception early when setting to an unknown value
* Don't set unknown account when editing mail.

This should fix #65. But the code turns ugly: caller of `HorizontalSelector#set_to` has to look before leap.

Needs to be backported to line-0.13-develop as well