Fixes #4619: Improve json prettifier
Merge pull request #472 from VinceMacBuche/ust_4618_implem_4619/improveJson_prettifier

Fixes #4619: Improve json prettifier
Fixes #4610: add support for reports, and var generation, for custom schedule
Merge pull request #473 from ncharles/ust_3679/dev/4610_support_configurable_agent_schedule

Refs #4610: add support for reports, and var generation, for custom sche...
Fixes #4632: Correct computation of pending interval
Merge pull request #475 from ncharles/bug_4632/dev/correct_duration_computation_of_pending_interval

Fixes #4632: Correct computation of pending interval
Issue #4617: minimun UI to set agent schedule