When serving over https, it should select https providers by default

[pRizz]

I'm proud to be hosting this awesome project here:
https://open-iota.prizziota.com/

But the app initially selects the bitfinex node, which is an http node, and we cannot connect to this when the webapp is served over https.

I may poke around the code and patch it up over the next few days/weeks.

[lsquires]

I think I have a solution to this on the dev branch, I'll commit once the wallet side is done!

[pRizz]

Cool! My temp fix was just to have my https node be the default, but we could balance the load if it selected a random node.