Support two adjacent phases turned off in rapid sequence (#1110, PR #1116)

Fix for A2osX low-level format for 48-trackl, 192K floppy image

source/Disk2CardManager.cpp

@@ -143,3 +143,8 @@ void Disk2CardManager::GetFilenameAndPathForSaveState(std::string& filename, std
 		}
 	}
 }
+
+void Disk2CardManager::SetStepperDefer(bool defer)
+{
+	m_stepperDeferred = defer;
+}