QpRelationResolver auto-filters deleted objects for toOne relations
QpSchemaVersioning::setRequiredVersion added and helper adjusted
QpMetaProperty::add/remove const
QpDao::remove/markAsDeleted no longer unlink relations
Qp::objectCast improved
Qp::objectCast fixed vor QObject variants
Qp::undelete no longer emits objectUpdated signal
QpObjectListModel handles undeleted objects correctly
WIP: File of QualityCheckItems
Finished QualityCheckItemLists
Code-layout and other improvements
Column hiding in EditableListView
QpStorage::dataAccessObject: QString and userType variants added
Added related object widgets to search
Removed time from order executions order-dueDate in model
Merge branch 'develop' of ssh://192.168.100.102:22/luebke/flightcontrol into develop

Conflicts:
	lib/QPersistence/src/conversion.cpp
QpSqlQuery::tableName property added

Property may be used for queries like
SELECT * FROM table AS tableName
and for subselect names:
SELECT * FROM (SELECT * FROM table) AS subSelectName
QpSqlDataAccessObjectHelper::readObjectsUpdatedAfterRevision fixed
QoDaoBase::readAllObjects reads the query when the revision has increased
wip