release: 0.6.0: Delivery detail page, DNS badge, machine metrics, wide layout

A page per delivery (`/deliveries/{id}`), reached from the *Details* link on
Added:
  - A page per delivery (`/deliveries/{id}`), reached from the *Details* link on
  - A **DNS** badge in the domain list, one per row, carrying the same
  - Machine metrics on the status page: a **Machine** card reporting the
  - An index of the current page's own sections in the navigation column, for the
Changed:
  - Every panel page is laid out in one column of the same width, so moving
  - The mark's small-size variant — the tab icon and the `SP` initials it
  - The stamp's `SELF-HOSTED SMTP RELAY` line is set at 11.5/0.15 instead of
  - The delivery log lists what identifies a message and nothing else: time,
  - Subjects are decoded for display as well as on the way in, so the rows the
  … (4 more in CHANGELOG)

Full detail: CHANGELOG.md (0.6.0).

test/e2e/main_test.go

@@ -166,7 +166,7 @@ func TestE2E(t *testing.T) {
 		}
 
 		if err := waitFor("send-log row to reach status=sent", 30*time.Second, 500*time.Millisecond, func() (bool, error) {
-			rows, err := sc.panel.sendLogRows(senderDomain)
+			rows, err := sc.panel.sendLogRows(senderDomain, "")
 			if err != nil {
 				return false, err
 			}