Download vagrant box not working behind proxy

Hi

I've configured PyCharm to use a proxy to connect to the internet (which works fine when updating remote environment, etc.) but when I try to add a new vagrant box by downloading it, it just sits there doing nothing.

When I connect to the internet directly and disable the proxy settings, it works.

Also, it would be very useful to see percentage done/time remaining (or something like that) on the "box download" popup, as it's hard to tell whether the process has crashed or is just slow...

Thanks!
Patrick