Merge pull request #289 from cpf/master

 #287 Fix property value persistence
Starting development of 1.46.2
#290 Correction for `OntrackBuildPropertyValue`
 #290 Correction of:
 - LastBuildPollingTrigger
 - LastBuildWithPromotionLevel
 - LastBuildWithValidationStamp
 - PromotionLevelPollingTrigger
 - ValidationStampPollingTrigger