Avoid showing "Processes: 0" in applications sidebar whilst loading
Showing "Processes: 0" whilst loading as it implies false information.
We should never have a cgroup with no processes, so it's safe to use that as a way to query if we're loading.
The use of space instead of "" is there to avoid getting a runtime warning from i18n about a missing argument.
A better fix will come when the underlying model is shared, and therefore we will have all information immediately.