TUI does not seem to report alive peers correctly

[noonio]

Context & versions

Related to #1878 and #1879 , it seems as though the list of alive peers is not reported correctly.

The main note is that

> etcdctl --endpoints 127.0.0.1:2383 member list
9f80290b38cfc88, started, hydra.horizon-haskell.net:5005, http://hydra.horizon-haskell.net:5005, http://127.0.0.1:2383, false
6346cc2697b59d09, started, 13.39.44.251:5001, http://13.39.44.251:5001, http://127.0.0.1:2379, false
9140f16a1adb1a87, started, 35.214.9.104:5005, http://35.214.9.104:5005, http://127.0.0.1:2383, false
989d1896a6ecce6f, started, 13.37.150.125:5001, http://13.37.150.125:5001, http://127.0.0.1:2379, false

can complete (i.e. you are in the majority) but the information in the alive-* keys does not indicate that:

> etcdctl --endpoints 127.0.0.1:2383 get --prefix alive
alive-35.214.9.104:5005
l35.214.9.104

i.e. here I seem to be in the majority (or member list) would fail; but I don't see anyone else alive (but myself).