Show torrent error message in transfer list

src/gui/transferlistdelegate.cpp

@@ -100,7 +100,10 @@ void TransferListDelegate::paint(QPainter *painter, const QStyleOptionViewItem &
         break;
     case TransferListModel::TR_STATUS: {
             const auto state = index.data().value<BitTorrent::TorrentState>();
+            const QString errorMsg = index.data(Qt::UserRole).toString();
             QString display = getStatusString(state);
+            if (state == BitTorrent::TorrentState::Error)
+                display += (": " + errorMsg);
             QItemDelegate::drawDisplay(painter, opt, opt.rect, display);
         }
         break;

src/gui/transferlistmodel.cpp

@@ -184,7 +184,7 @@ QVariant TransferListModel::data(const QModelIndex &index, const int role) const
     case TR_PROGRESS:
         return torrent->progress();
     case TR_STATUS:
-        return QVariant::fromValue(torrent->state());
+        return (role == Qt::DisplayRole) ? QVariant::fromValue(torrent->state()) : torrent->error();
     case TR_SEEDS:
         return (role == Qt::DisplayRole) ? torrent->seedsCount() : torrent->totalSeedsCount();
     case TR_PEERS: