When deleting the last account, method ProfileModelPrivate::slotAccountRemoved
destroy the account then save the profile.
This last triggers NewAccountModelPimpl::slotProfileUpdated().
But this one access to an empty account array (as all account are destroyed).

Re-order profile-save/account delete to solve the issue (save first, destroy after).

Change-Id: I427a51c3d1f97d0127567531616f360df45e4652
Reviewed-by: Nicolas Jäger <nicolas.jager@savoirfairelinux.com>