don't crash on in-game connection loss either

OpenRa.Game/Chrome.cs

@@ -217,6 +217,9 @@ namespace OpenRa
 			var r = new Rectangle((Game.viewport.Width - w) / 2, (Game.viewport.Height - h) / 2, w, h);
 			DrawDialogBackground(r, optionsSprites, true);
 			DrawCentered(text, new int2(Game.viewport.Width / 2, Game.viewport.Height / 2 - 8), Color.White);
+
+			// don't allow clicks through the dialog
+			AddButton(r, _ => { });
 		}
 
 		public void DrawLobby()
@@ -260,6 +263,9 @@ namespace OpenRa
 			DrawDialogBackground(chatBox, panelSprites, false);
 
 			DrawChat(typingBox, chatBox);
+
+			// block clicks `through` the dialog
+			AddButton(r, _ => { });
 		}
 
 		public void TickRadarAnimation()

OpenRa.Game/Graphics/Viewport.cs

@@ -53,6 +53,10 @@ namespace OpenRa.Graphics
 			{
 				Game.world.WorldRenderer.Draw();
 				Game.chrome.Draw();
+
+				if (Game.orderManager.IsNetplay && 
+					Game.orderManager.Sources.OfType<NetworkOrderSource>().First().State == ConnectionState.NotConnected)
+					Game.chrome.DrawDialog("Connection lost.");
 			}
 			else
 			{
@@ -64,7 +68,7 @@ namespace OpenRa.Graphics
 					switch (nos.State)
 					{
 						case ConnectionState.Connecting:
-							Game.chrome.DrawDialog("Connecting to {0}:{1}".F( Game.Settings.NetworkHost, Game.Settings.NetworkPort ));
+							Game.chrome.DrawDialog("Connecting to {0}:{1}...".F( Game.Settings.NetworkHost, Game.Settings.NetworkPort ));
 							break;
 						case ConnectionState.NotConnected:
 							Game.chrome.DrawDialog("Connection failed.");

OpenRa.Game/Orders/NetworkOrderSource.cs

@@ -42,6 +42,8 @@ namespace OpenRa.Orders
 				{
 					var reader = new BinaryReader(socket.GetStream());
 
+					try
+					{
 						for (; ; )
 						{
 							var len = reader.ReadInt32();
@@ -62,6 +64,12 @@ namespace OpenRa.Orders
 								}
 							}
 						}
+					}
+					catch (IOException e)
+					{
+						State = ConnectionState.NotConnected;
+					}
+
 				}) { IsBackground = true }.Start();
 			}
 			catch