mshtml: Don't expose readyState property to elements in IE11 mode.

dlls/mshtml/htmlelem.c

@@ -6301,6 +6301,7 @@ void HTMLElement_init_dispex_info(dispex_data_t *info, compat_mode_t mode)
 {
     static const dispex_hook_t elem2_ie11_hooks[] = {
         {DISPID_IHTMLELEMENT2_DOSCROLL, NULL},
+        {DISPID_IHTMLELEMENT2_READYSTATE, NULL},
         {DISPID_UNKNOWN}
     };
 

dlls/mshtml/tests/documentmode.js

@@ -32,6 +32,7 @@ sync_test("elem_props", function() {
     var v = document.documentMode;
 
     test_exposed("doScroll", v < 11);
+    test_exposed("readyState", v < 11);
     test_exposed("querySelectorAll", v >= 8);
     test_exposed("textContent", v >= 9);
     test_exposed("prefix", v >= 9);