qt: rework "receive coins" workflow

src/qt/walletframe.h

@@ -52,8 +52,6 @@ public slots:
     void gotoOverviewPage();
     /** Switch to history (transactions) page */
     void gotoHistoryPage();
-    /** Switch to address book page */
-    void gotoAddressBookPage();
     /** Switch to receive coins page */
     void gotoReceiveCoinsPage();
     /** Switch to send coins page */
@@ -73,6 +71,11 @@ public slots:
     /** Ask for passphrase to unlock wallet temporarily */
     void unlockWallet();
 
+    /** Show used sending addresses */
+    void usedSendingAddresses();
+    /** Show used receiving addresses */
+    void usedReceivingAddresses();
+
     /** Set the encryption status as shown in the UI.
      @param[in] status            current encryption status
      @see WalletModel::EncryptionStatus