Merge bitcoin-core/gui#318: Add `Copy address` Peers Tab Context Menu Action

3ec061d9da qt: Add "Copy address" item to the context menu in the Peers table (Hennadii Stepanov)

Pull request description:

  Picking up #264

  This adds a `Copy Address` context menu action to the `Peers Tab`.

  Based on the first commit of PR #317 so that we can use `Qt::DisplayRole` in the `copyEntryData` function.

  | Master        | PR               |
  | ----------- | ----------- |
  |  ![Screen Shot 2021-05-05 at 4 51 11 AM](https://user-images.githubusercontent.com/23396902/117117822-fb067400-ad5d-11eb-9466-228456108e52.png) | ![Screen Shot 2021-05-05 at 4 49 15 AM](https://user-images.githubusercontent.com/23396902/117117835-fe99fb00-ad5d-11eb-8de0-f6a9acdbf40e.png) |

ACKs for top commit:
  shaavan:
    tACK 3ec061d9da
  luke-jr:
    utACK 3ec061d9da
  hebasto:
    ACK 3ec061d9da, tested on Linux Mint 20.2 (Qt 5.12.8):

Tree-SHA512: be0d7324592aae3928fa3cc522294f17226419fe8cbe3587df12a36bd4fa9c81bead377b13051e950b9a3fcd290b273861e70d6c76b75cdf76eaf58224b834cd

src/qt/rpcconsole.cpp

@@ -680,6 +680,11 @@ void RPCConsole::setClientModel(ClientModel *model, int bestblock_height, int64_
 
         // create peer table context menu
         peersTableContextMenu = new QMenu(this);
+        //: Context menu action to copy the address of a peer
+        peersTableContextMenu->addAction(tr("&Copy address"), [this] {
+            GUIUtil::copyEntryData(ui->peerWidget, PeerTableModel::Address, Qt::DisplayRole);
+        });
+        peersTableContextMenu->addSeparator();
         peersTableContextMenu->addAction(tr("&Disconnect"), this, &RPCConsole::disconnectSelectedNode);
         peersTableContextMenu->addAction(ts.ban_for + " " + tr("1 &hour"), [this] { banSelectedNode(60 * 60); });
         peersTableContextMenu->addAction(ts.ban_for + " " + tr("1 d&ay"), [this] { banSelectedNode(60 * 60 * 24); });