Task creation event flow can be inappropriate

The problem is here
https://bitbucket.org/mittagqi/translate5/src/f0f0cb20c47fd5ca33c98bef756e8cbeee5a66bc/application/modules/editor/Bootstrap.php#lines-97
`afterDirectoryParsing` is fired in FileTree worker
And the problem is that because FileTree worker is queued in between `beforePost` and `afterPost` events during handling task creation, It is trying to queue quality provider workers before the task is actually fully created. Therefore if we have afterPost event listeners they can work inappropriately.