scripted-diff: Rename ShowModalDialogAndDeleteOnClose

-BEGIN VERIFY SCRIPT-
sed -i 's/ShowModalDialogAndDeleteOnClose/ShowModalDialogAsynchronously/' -- $(git grep -l -e "ShowModalDialogAndDeleteOnClose")
-END VERIFY SCRIPT-

It is important to highlight that a modal dialog is showed
asynchronously as there are cases when the synchronous QDialog::exec()
is required.

src/qt/addressbookpage.cpp

@@ -189,7 +189,7 @@ void AddressBookPage::onEditAction()
     dlg->setModel(model);
     QModelIndex origIndex = proxyModel->mapToSource(indexes.at(0));
     dlg->loadRow(origIndex.row());
-    GUIUtil::ShowModalDialogAndDeleteOnClose(dlg);
+    GUIUtil::ShowModalDialogAsynchronously(dlg);
 }
 
 void AddressBookPage::on_newAddress_clicked()