TYPO3 Core

If some JavaScript already registered a class in the global namespace TYPO3. prior to loading common.js in the backend.php (which is the case if added using $GLOBALS['TBE_TEMPLATE']->getPageRenderer()) the class gets overwritten by common.js with

var TYPO3 = {
...
};

Id suggest to do it that way:

var TYPO3 = TYPO3 ? TYPO3 : {};
var TYPO3 = Ext.apply(TYPO3,{
...
});

see diff attached
gRTz pekue

(issue imported from #M16614)