message: Add "system" field to tooltip and event list fields
diff: @@ -1341,6 +1341,8 @@ std::string get_event_fields_str( const trace_event_t &event, const char *eqstr,
  fieldstr += str;
  }
  + fieldstr += string_format( "%s%s%s", "system", eqstr, event.system );
  +
  return fieldstr;
  }
  