Fixes #8260 - fix memory leak on IE and errors in doh runner by cleaning up this iframe on unload if it exists
Fixes #8260 - fix memory leak on IE and errors in doh runner by cleaning up this iframe on unload if it exists

git-svn-id: ee6e786acc44c9cca5ee17c71a5576c45c210361@16047 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful