Add context menu on transaction list: copy label, copy address, edit label, show details

src/qt/addresstablemodel.h

@@ -49,6 +49,15 @@ public:
      */
     bool validateAddress(const QString &address);
 
+    /* Look up label for address in address book, if not found return empty string.
+     */
+    QString labelForAddress(const QString &address) const;
+
+    /* Look up row index of an address in the model.
+       Return -1 if not found.
+     */
+    int lookupAddress(const QString &address) const;
+
 private:
     CWallet *wallet;
     AddressTablePriv *priv;