Downloading Maps Poor Stability

[HTRamsey]

If you try to do multiple larger downloads then you get crashes, download fails, maps disappearing from list in UI, etc. Seems to crash occasionally in QGeoMapReplyQGC.cpp when trying to get the network proxy from the network manager. My guess would be it's an issue with multiple access to the proxy item. Maybe just making the cache error connection queued will fix it, not sure.