[dialog addon] Add kludge for IE focus bug

Issue #2191

addon/dialog/dialog.js

@@ -39,6 +39,7 @@
       CodeMirror.on(inp, "keydown", function(e) {
         if (options && options.onKeyDown && options.onKeyDown(e, inp.value, close)) { return; }
         if (e.keyCode == 13 || e.keyCode == 27) {
+          inp.blur();
           CodeMirror.e_stop(e);
           close();
           me.focus();