Bug #583773 - Does not always mark mails as read automatically
Bug #707121 - Merge contacts dialogs indefinitely expands by itself
User docs: Replace dead link to projects.gnome.org by wiki.g.o

This breaks the string freeze for 3.10, but still better than
having a completely broken link.

See bug #721907
Bug #707518 - Deleting a local address book triggers error "Unable to open address book"
Fix a runtime warning after a change for bug #583773

Missed a case when an EMailReader is an EMailBrowser, which is not
an EMailView, which produced a runtime warning on a console when
a message was shown in a separate window (like after double-clicking it).
Bug #721213 - Character encoding combo opened empty
Avoid multiple save of folder changes on application quit

While looking at bug #721286, I found out that mail_shell_view_prepare_for_quit_cb
calls a sync of the folder changes to the server, but mail_backend_prepare_for_quit_cb
does the same thing (or even more, because it calls to synchronize changes in all folders),
thus the former is redundant and can be dropped.