- clean up SwSection..Hint: Lazily reusing the Dying HintId is evil
- switch the SwChartDataSequence to SvtListener
- add some description to RuntimeException

Change-Id: I897a63030f207cabe4d1ba7de0c25c6c581ffd1f
Reviewed-on: https://gerrit.libreoffice.org/65816
Tested-by: Jenkins
Reviewed-by: Björn Michaelsen <bjoern.michaelsen@libreoffice.org>