Sort chip: space the arrow like its paging neighbours

"Sort →" reads as the same shape as "Page ↑" two chips over; "Sort→" was
the odd one out. Still six cells, so the lane still sums to 53.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

meshterm/ui/contactlist.py

@@ -361,7 +361,7 @@ class ContactListScreen(SelectScreen):
         lane = list(DEFAULT_LANE)
         descend = self._sort.ascending  # ascending now, so the flip lands descending
         lane[2] = FPair(
-            "Sort→",
+            "Sort →",
             "ctrl_right",
             "Sort ▼" if descend else "Sort ▲",
             "ctrl_down" if descend else "ctrl_up",