Clean up phpDoc comments for the following classes:

* typo3/ajax.php
* typo3/alt_clickmenu.php
* typo3/alt_db_navframe.php

Clean up provides:

* Provide correct parameter names in phpDoc
* Provide correct data types in phpDoc
* CGLify phpDoc (remove tabs)

Change-Id: I95b0dffa62a4a057a6a3c4e913e02498b21187cc
Resolves: #37909
Releases: 6.0
Reviewed-on: http://review.typo3.org/11933
Reviewed-by: Susanne Moog
Tested-by: Susanne Moog