Fix incorrect wanted value in Radarr widget

fixes #397

src/widgets/radarr/widget.js

@@ -1,6 +1,18 @@
 import genericProxyHandler from "utils/proxy/handlers/generic";
 import { jsonArrayFilter } from "utils/proxy/api-helpers";
 
+function isAvailable(item) {
+  // isAvailable means that a digital image exists
+  // E.g. it's available to stream or on DVD, etc
+  if (item.isAvailable === false) {
+    return false;
+  }
+
+  // sizeOnDisk is how much of that digital image you currently have
+  // movieFile.size is how large the requested digital image is
+  return item.sizeOnDisk === item.movieFile?.size;
+}
+
 const widget = {
   api: "{url}/api/v3/{endpoint}?apikey={key}",
   proxyHandler: genericProxyHandler,
@@ -9,8 +21,8 @@ const widget = {
     movie: {
       endpoint: "movie",
       map: (data) => ({
-        wanted: jsonArrayFilter(data, (item) => item.isAvailable === false).length,
-        have: jsonArrayFilter(data, (item) => item.isAvailable === true).length,
+        wanted: jsonArrayFilter(data, (item) => !isAvailable(item)).length,
+        have: jsonArrayFilter(data, (item) => isAvailable(item)).length,
       }),
     },
     "queue/status": {