MonitorTiming update

This MR updates MonitorTiming algorithm for detailed timing in G4 volumes. Key points:

• Support a variable list of tracked detectors (volumes, configured via property) vs. hardcoded counters and reports in the old version;
• New option file for the upgrade baseline configuration;
• Support aggregating detectors in groups in the summary, e.g. separately display aggregate time for Velo, TT, IT and OT under Tracking.

Side note: this change requires an update in LHCbPR2 DetailedTiming analysis module to support variable lists of detectors and their random order, to allow comparing results for jobs with different configurations of detector geometry.