Change default wxWebViewIE offline behavior

Allow opening web pages using this backend on systems without any
network connection too.

See https://github.com/wxWidgets/wxWidgets/pull/1133

src/msw/webview_ie.cpp

@@ -110,6 +110,10 @@ bool wxWebViewIE::Create(wxWindow* parent,
 
     EnableControlFeature(21 /* FEATURE_DISABLE_NAVIGATION_SOUNDS */);
 
+    // Make behaviour consistent with the other backends when loading localhost
+    // pages without any physical network connection.
+    SetOfflineMode(false);
+
     LoadURL(url);
     return true;
 }