Carry the level everywhere a position is drawn, and gate it per occurrence

plugins/printers/api/asset_routes.py

@@ -1042,7 +1042,7 @@ def _get_low_supplies_data():
                 'model': model_number,
                 'location': location_name,
                 'mapx': asset.mapx,
-            'levelid': asset.levelid,
+                'levelid': asset.levelid,
                 'mapy': asset.mapy,
                 'supplies': annotated
             })
@@ -1479,6 +1479,10 @@ def dashboard_supplies():
             # card, it just has nothing to preview.
             'mapx': printer.get('mapx'),
             'mapy': printer.get('mapy'),
+            # The level those pixels belong to (ADR-017). Without it the hover
+            # preview cannot draw the marker and says so, which is what the
+            # dashboard card and the toner report were both doing.
+            'levelid': printer.get('levelid'),
             'iscritical': any(s['status'] == 'critical' for s in depleted),
             'supplies': [{
                 'text': '{} {}%'.format(_shortsupplyname(supply.get('name')),