gui: fix ban from qt console

Rather than doing a circle and re-resolving the node's IP, just use the one
from nodestats directly.

This requires syncing the addr field from CNode.

src/net.h

@@ -505,6 +505,7 @@ public:
     double dPingWait;
     double dPingMin;
     std::string addrLocal;
+    CAddress addr;
 };