NET blip flashes, clears itself after 5 minutes, hold NET clears it; Restart page is now page 20

- The remembered network blip is a flashing amber warning (new "notice"
  level, not counted as DOWN): press NET to stop the flashing, hold NET 2 s
  to clear it, otherwise it goes by itself after 5 minutes (was 3, solid).
- The user moved the Restart page to page 20: config, the RESTART PAGE key
  on page 19 and both pages re-pushed. A scan of all pages finds no other
  button pointing at the old page.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

config.json

@@ -20,7 +20,7 @@
     "burst_connections": 4,
     "burst_groups": 3,
     "burst_window_seconds": 10,
-    "remember_seconds": 180
+    "remember_seconds": 300
   },
 
   "alert_webhook": "",
@@ -78,7 +78,7 @@
   },
 
   "restart_page": {
-    "page": 23, "page_name": "23\\nRestart", "jump_pos": [2, 6], "back_pos": [3, 0],
+    "page": 20, "page_name": "20\\nRestart", "jump_pos": [2, 6], "back_pos": [3, 0],
     "keys": [
       { "id": "rs_dvs_prop",   "label": "DVS PROP",   "pos": [0, 1], "fix": "dvs_prop" },
       { "id": "rs_dvs_tracks", "label": "DVS TRACKS", "pos": [0, 2], "fix": "dvs_tracks" },