Editors: Move id() from editor to document.

Change-Id: Ib81076842ab1c16832224790194b001206404d64
Reviewed-by: hjk <hjk121@nokiamail.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/tasklist/taskfile.cpp

@@ -39,7 +39,9 @@ using namespace TaskList::Internal;
 // --------------------------------------------------------------------------
 
 TaskFile::TaskFile(QObject *parent) : Core::IDocument(parent)
-{ }
+{
+    setId("TaskList.TaskFile");
+}
 
 TaskFile::~TaskFile()
 { }