[+] Added Task::loggingToQtMsgLoggerEngineEnabled() and
setLoggingToQtMsgLoggerEngineEnabled().
[+] Added Task::loggingToConsoleLoggerEnabled() and
setLoggingToConsoleEnabled().
[+] Added TaskManager::forwardTaskMessagesToConsoleEngine() and
setForwardTaskMessagesToConsoleEngine(). Previously forwarding of task
messages to the console was controlled by
TaskManager::forwardTaskMessagesToQtMsgEngine().