Merge #13537: GUI: Peer table: Visualize inbound/outbound state for every row

4132ad3 Show symbol for inbound/outbound in peer table (wodry)

Pull request description:

  Fixes #13483

  The address in the network peer table is prefixed with an up-arrow symbolizing an outbound connection, or an down-array symbolizing an inbound connection. See screenshot.

  The user has an easy visual confirmation about the connection direction state. I really like it :)
  Impact to columns sorting is grouping by inbound/outbound first, which in my opinion is an advantage, too.
  ![bildschirmfoto](https://user-images.githubusercontent.com/8447873/41862752-13803eb2-78a5-11e8-9126-a52385f5ec19.png)

Tree-SHA512: d355f679d34c3006743c06750be5f36a083c1a8376da8f5f35045fcd9df964153409946fdde5007734f23bd692c91355962dc42df31122cdcf88e4affce8bc0e

Author: jonasschnelli

src/qt/peertablemodel.cpp

@@ -160,7 +160,8 @@ QVariant PeerTableModel::data(const QModelIndex &index, int role) const
         case NetNodeId:
             return (qint64)rec->nodeStats.nodeid;
         case Address:
-            return QString::fromStdString(rec->nodeStats.addrName);
+            // prepend to peer address down-arrow symbol for inbound connection and up-arrow for outbound connection
+            return QString(rec->nodeStats.fInbound ? "↓ " : "↑ ") + QString::fromStdString(rec->nodeStats.addrName);
         case Subversion:
             return QString::fromStdString(rec->nodeStats.cleanSubVer);
         case Ping: