Allow persistence across files. Preserve the use of "window" even
though we're really a dialog.
Update ByteViewTab and ProtoTree to support multiple instances.
Remove the need for a cast in frame_data.
Add more forward declarations.
Change-Id: I50d3d9d1455b8ecc158a37218f9e41fe696d5ae2
Reviewed-on: https://code.wireshark.org/review/7086
Petri-Dish: Gerald Combs <gerald@wireshark.org>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Gerald Combs <gerald@wireshark.org>