Partial IPv6 node address info

[HiHat]

Only first part of IPv6 node address displayed, like "[2601", "[2a01".

[HiHat]

Possible due to following code in /src/app/components/nodes-list/nodes-list.component.html:
<td>{{ peer.addr.split(":")[0] }}</td>

[HiHat]

#59