Add "displayTime" property

IS [#45517239] [#45517433] [#45524171] and [#44604321]
Use 'displayTimePerTick' in graph controller

IS [#39252025]
Use displayTime in modelTimeFormatter (showClock)

IS [#45524171]
Use "displayTime" as time column in export to DG

IS [#45517433]
Use displayTime fixes in  pendulum and mass-spring

IS [#45517239] [#45524171]
Add exports to pendulum and mass-spring