GH-1927 Add more specific task status logging

* Tasks are now described by class name and object name (or memory address).
* Tasks starts are logged.
* Aborted tasks are now treated just as the other cases.

api/logic/minecraft/onesix/update/FoldersTask.h

@@ -5,6 +5,7 @@
 class OneSixInstance;
 class FoldersTask : public Task
 {
+	Q_OBJECT
 public:
 	FoldersTask(OneSixInstance * inst);
 	void executeTask() override;