Merge origin/main into the 0.5.0 redesign

Brings in 0.4.8: connection log, uninstall and update from the awg-ctrl menu,
secret panel path, stealth hub and sen:// port, random I1/MTU on install.
install.sh keeps the new output (spinner, cards, outdated-install wipe) on top
of the reorganised installer; an outdated install can be reinstalled with a
wipe or removed. The connection log tab uses the MD3 segmented button; its
metrics-token scrape snippet moved to Settings.

internal/ui/outdated_test.go

@@ -79,7 +79,7 @@ func TestCmpVersion(t *testing.T) {
 	for _, c := range []struct {
 		a, b string
 		sign int
-	}{{"0.5.0", "0.5.0", 0}, {"0.4.9", "0.5.0", -1}, {"0.10.0", "0.9.9", 1}, {"0.5", "0.5.0", 0}, {"0.5.1-beta", "0.5.1", 0}} {
+	}{{"0.5.0", "0.5.0", 0}, {"0.4.9", "0.5.0", -1}, {"0.10.0", "0.9.9", 1}, {"0.5", "0.5.0", 0}, {"0.5.1-beta", "0.5.1", 0}, {"Beta 0.4.7", "0.5.0", -1}} {
 		got := cmpVersion(c.a, c.b)
 		if (got > 0) != (c.sign > 0) || (got < 0) != (c.sign < 0) {
 			t.Errorf("cmpVersion(%q, %q) = %d", c.a, c.b, got)