Map improvements

[dskvr]

• [x] disable monitors
• [x] show monitors only on hover (only show relay point)
• [ ] enable specific monitor operators (depends on https://github.com/nostr-protocol/nips/pull/1182 implementation for NIP-66 monitors)
• [ ] enable specific monitors (default: all) workaround for #18
• [ ] Fix current user location (default: opt-in)
• [ ] Too optimistic, better error handling (history.nostr.watch cert didn't renew correctly, meaning that monitor events were not populated for an hour, resulting in a null dataset that was not handled. Irrelevant to this, need to publish monitor events to more relays)