adjust code to work with refactored levelling, .. cell selecting does not work yet
Merge remote-tracking branch '52n/master' into develop
table has to be set on coverage after features has been loaded (as after refactoring each feature takes its own record and has to be present)
make detecting timestamp column more generic to also handle timestamp columns without timezone
use const references
readonly columns when (part of a) primary key
Merge remote-tracking branch '52n/master'
fix signature to override method
register format filter which can be used via connectTo later on
add missing include
add support for storing plain tableplain table  changes back to database
set binaryLoaded flag appropriately
provide a postgresqlconnector operation for UI
move preparing subfeature semantic preparation to util class
Merge remote-tracking branch '52n/master'
Merge remote-tracking branch '52n/master'
add sql helper to create sql statements
fix minor syntax issues
Merge remote-tracking branch '52n/master'