Allow labels on recieve tab

src/addressbook.h

@@ -44,6 +44,9 @@ public:
     // Remove a new address/label from the database
     void removeAddressLabel(QString label, QString address);
 
+    // Update a label/address
+    void AddressBook::updateLabel(QString oldlabel, QString address, QString newlabel);
+
     // Read all addresses
     const QList<QPair<QString, QString>>& getAllAddressLabels();