[TYPO3-core] FYI: Fixed bug #14413: htmlArea RTE: ExtJS resources are not released in IE when RTE closes

[Stanislas Rolland]

FYI: The attached SVN patch was committed.

Type:
Bugfix

Problem:
1. ExtJS does not release resources used by the RTE when the RTE iframe
    is unloaded in IE.
2. ExtJS KeyMap objects make IE leak memory.

Solution:
Do explicit cleanup before the RTE is destroyed.
Nullify references to DOM left over by Ext.get().
Nullify KeyMaps private event handlers.

Bugtracker references:
http://bugs.typo3.org/view.php?id=14413

Branches:
trunk (revision 7638)

Regards,
Stanislas
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