lack of /proc/<pid>/sched should display better info

[codyps]

Right now on systems without this:

• "Top CPU consumers" and "Top PSS consumers" show only a list of 0.000s [0], 0K - [0], and a single 393K - [1].
• "Processes" table shows only [1]-0.021s (null) (no other processes listed).
• "Memory allocation - Pss" shows only pids ([123], etc)

Things to do:

• [ ] track the pid-only (no names) case correctly for top lists & processes table
• [ ] use /proc/<pid>/comm, /proc/<pid>/exe, /proc/<pid>/cmdline, etc for naming