Fixes #2409
Fixes a problem where the section title was not updated when editing a time period's partials
Fixes a problem with TimePeriodElement
Fixes a problem with DateDetail elements where the parse text was always overwritten with the parsed text when parsing ;)
Fixes #2309
Changed the behavior of !TimePeriodElement and according widgets to better comply with the requirements and library implementation.
had to rename the packages to make them compliant with buckminster