qt: add copy subnet action banned peer

This adds a copy subnet context menu action for peers in the banned peer table

(cherry picked from commit d518d67)

src/qt/rpcconsole.cpp

@@ -706,6 +706,11 @@ void RPCConsole::setClientModel(ClientModel *model, int bestblock_height, int64_
 
         // create ban table context menu
         banTableContextMenu = new QMenu(this);
+        //: Context menu action to copy the subnet of a banned peer
+        banTableContextMenu->addAction(tr("&Copy subnet"), [this] {
+            GUIUtil::copyEntryData(ui->banlistWidget, BanTableModel::Address, Qt::DisplayRole);
+        });
+        banTableContextMenu->addSeparator();
         banTableContextMenu->addAction(tr("&Unban"), this, &RPCConsole::unbanSelectedNode);
         connect(ui->banlistWidget, &QTableView::customContextMenuRequested, this, &RPCConsole::showBanTableContextMenu);