PFS tables now uses the IDLE timer to normalize IDLE event times.
Related changes:
 - Moved global class registration to a separate function
 - Added missing PFS class type enums
 - Created array of class-timer mapping
 - For all tables, cache timer normalizer in table class
 - For tables where timer normalizer changes row-to-row, get a new normalizer when the view (event type) changes
 - For tables where timer normalizer does not change, initialize normalizer once in rnd_init()