Add 1.5 feature demos to the screenshots package and fix the capture script (#2954)

shared/data/charts.json

@@ -771,6 +771,12 @@
     ],
     "name": "Plan comparison"
   },
+  "radar-large": {
+    "extend": "radar",
+    "demo": false,
+    "legend": false,
+    "radar-size": 115
+  },
   "polar-area": {
     "demo": true,
     "type": "polarArea",
@@ -944,6 +950,10 @@
       }
     ]
   },
+  "revenue-vs-orders-plain": {
+    "extend": "revenue-vs-orders",
+    "y-axes": [{ "series-name": "Revenue" }, { "series-name": "Orders", "opposite": true }]
+  },
   "uptime-sla": {
     "type": "line",
     "categories": ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],