Now that virt-manager requires very modern versions of gtk, it's
quite unlikely that we will even run on a system with an old
libguestfs version, so don't bother checking versions.
When a VM is undefined, whether explicitly through virt-manager or behind
our back, we close and cleanup any associated vmmDetails windows. However
there's a race here: if the details window is the last remaining top
level window, cleanup() is called twice which tracebacks.
Fix this by dispatching the exit_app routine in an idle callback, to
avoid racing with any window delete routines.
Reported-by: Leonardo Garcia <lagarcia@br.ibm.com>
And drop a whole bunch of legacy dbus fallback stuff. Now that we
are bumping the host dependencies to very recent gtk, none of the
back compat should matter.
Despite being a known quantity, autotools is so overkill for our needs,
so let's drop it and replace it with a much simpler and easy to customize
system.
