NetPlay: Implement chunked data transfer

This sends arbitrary packets in chunks to be reassembled at the other
end, allowing large data transfers to be speed-limited and interleaved
with other packets being sent. It also enables tracking the progress of
large data transfers.

Source/Core/DolphinQt/CMakeLists.txt

@@ -93,6 +93,7 @@ add_executable(dolphin-emu
   GameList/ListProxyModel.cpp
   GCMemcardManager.cpp
   QtUtils/BlockUserInputFilter.cpp
+  NetPlay/ChunkedProgressDialog.cpp
   NetPlay/GameListDialog.cpp
   NetPlay/MD5Dialog.cpp
   NetPlay/NetPlayDialog.cpp