Sort out some of the confusion r29706 introduced (visible vs. physical rows). We...

Sort out some of the confusion r29706 introduced (visible vs. physical rows). We choose the wrong packet in the packet view because we used the physical row instead of the visible. I suspect there a couple more of these lurking.

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@29708 f5534014-38df-0310-8fa8-9805f1628bb7