The eliding of long addresses (Onion v3 etc) in the Peers tab in their middle was discussed in #262.
On master (f0fa32450ec35056b3e1025262aeaef4a24c35ee):

With this PR:

This PR suggests the minimal diff to achieve the goal. OTOH, this change in behavior is common for all columns in the Peers table, but it seems harmless.
