TYPO3 Core

The pagetree filter sometimes drops out.

Steps to reproduce.

1. Take a large pagetree (I used list module) and open it
2. filter the search tree with a string containing the name of a page deep down.
3. click that page.
4. add a record, e.g. a new subpage (this is just an example, happens in other cases too)
5. the pagetree will be uncollapsed. the filter string is still there, but has no effect anymore