Add function to clear connectionModel data

Preparation primarily for mobile. When we want to switch in
one session from BT to cable connection and vise versa, we
need a way to clear the model data containing the possible
connections in use.

Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>

core/connectionlistmodel.h

@@ -15,6 +15,7 @@ public:
 	QString address(int idx) const;
 	int rowCount(const QModelIndex &parent = QModelIndex()) const;
 	void addAddress(const QString address);
+	void removeAllAddresses();
 private:
 	QStringList m_addresses;
 };