Fix #1456 -- Wrapped C++ object deleted
Fix #1456 -- Wrapped C++ object deleted

This was happening because a QTimer.singleShot was being sent to a
lambda of an object that was deleteLater'd.

TODO: Make all singleShots go to instnace methods so PyQt can internally
set the timer receiver properly.

fyookball/electrum,fyookball/electrum,fyookball/electrum