TYPO3 Core

Problem:
Currently the context menu options above are partly broken. The three last ones are refreshing the pagetree too fast and the first one completely doesn't work.

Solution:
Add a delay to the tree refreshing feature to increase the possibility that the page is deleted/enabled/disabled before the node is refreshed.

Also the mount as tree root feature javascript call was rewritten to use the new methods of the pagetree.

Note:
The solution looks like a hack and in fact it is an hack, but it works in most situations. We can drop this feature if you prefer an broken old context menu or let's add it and finally replace the old context menu in 4.6.

(issue imported from #M17279)