Tests that a POST targetted to a frame is handled correctly when navigating away and coming back to the page.




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Frame: 'target-frame'
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============== Back Forward List ==============
curr->  http://127.0.0.1:8000/navigation/post-frames-goback1-uncached.html  **nav target**
            http://127.0.0.1:8000/navigation/resources/form-target-uncached.pl (in frame "target-frame")
        http://127.0.0.1:8000/navigation/resources/go-back.html  **nav target**
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