Matthias Jentsch 54207d3427 Revert "Abort pending AJAX requests before page unload"
This reverts commit 94bdb8b4b072c9fadac77830325f727a14f93f85. After the patch, Firefox shows an error message on each reload for an unknown reason.

refs #7759
2015-05-19 17:06:22 +02:00
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