Vista gets its own button (row 2, next to APPS)

The Art-Net heartbeat moves from APPS to a VISTA tile ("VISTA / SILENT";
"VISTA SILENT" on SHOW and ALL), hold starts Vista if it is not running.
SHOW now groups MIDI, APPS and VISTA. Tested live before the move: closing
Vista and Resolume alarmed, and each hold brought them back (Vista 5 s,
Arena 9 s after the hold).

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

status_panel.py

@@ -449,7 +449,8 @@ def check_artnet(chk, snap, ctx):
         return [("artnet", Result(OK))]
     last = snap.artnet_last.get(chk["source"])
     if last is None or ctx["now"] - last > limit:
-        return [("artnet", Result(ERR, chk.get("msg", "ART-NET SILENT"), named=True))]
+        # A custom "msg" names the program itself ("VISTA SILENT"); on its own button plain "SILENT" will do.
+        return [("artnet", Result(ERR, chk.get("msg", "SILENT"), named="msg" in chk))]
     return [("artnet", Result(OK))]