temporarily revert PeersNumByType (needs follow-up)

This is a reversion of
16f77a5
from #359
which changed code in Bitcoin Core to notify new peers by their type.

That code needs to be either merged upstream to Bitcoin Core or
otherwise worked-around in gui-qml. Since the actual notification from
Bitcoin Core only sends an int of the TOTAL number of connections
(not just OUTBOUND) whatever UI there is to display this number to the
user is probably now labeled incorrectly.

Author: pinheadmz

qml/models/nodemodel.cpp

@@ -162,8 +162,8 @@ void NodeModel::ConnectToNumConnectionsChangedSignal()
     assert(!m_handler_notify_num_peers_changed);
 
     m_handler_notify_num_peers_changed = m_node.handleNotifyNumConnectionsChanged(
-        [this](PeersNumByType new_num_peers) {
-            setNumOutboundPeers(new_num_peers.outbound_full_relay + new_num_peers.block_relay);
+        [this](int new_num_connections) {
+            setNumOutboundPeers(new_num_connections);
         });
 }