TYPO3 Core

After some investigations from Bennie and me we came to the conclusion that the errors in IE are caused by the ExtJs prototype-adapter. Errors are gone immediately after switching to ext-base.

Comment from ExtJs Core member:

"I think that there are actually some speed disadvantages to using the
adapter. I would say stick with ext-base and use prototype outside of
Ext wherever you need to."

Solution:
Don't use prototype adapter by default, always use ext-base. For template.php, only use prototype-adapter when it's forced to use.

(issue imported from #M10964)