Add and edit multiple relays at once

Unless I missed some GUI option (I tried every button), it looks like I need to add ~180 relays manually (which is quite the hassle). And this seems to be the case for every option (outage, bandwidth, flags). There are quite a few operators with tens of relays so this will be a similar experience for quite a few people.

To demonstrate how bad this is: if I would want to use Tor Bandwidth, Node Bandwidth and three of the Node Flag features, I would need 4600+ mouse clicks, 900 fingerprint copy pastes and 1200 additional information entries. Since I don't like getting RSI I'll just skip that ;).

At first I thought the only issue was not being able to add multiple relays at once. But after giving it some more thought I feel the real fundamental issue is the lack of Tor Family support like mentioned in #17. Still, being able to add multiple Tor relays at once would be a great and useful addition. Tor Weather could for example accept a paste with one fingerprint per line (like the Effective Family Members list on metrics.torproject.org).

Editing relays also can be improved significantly. For example let's say you want to edit the waiting time for a category of your relays, it would take a tremendous amount of mouse button clicks and time to change this. But when this could be configured for multiple relays at once, it's manageable.