Transform extension list to array

Signed-off-by: Alex Andreev <alex.andreev.email@gmail.com>

src/renderer/components/+extensions/extensions.tsx

@@ -516,7 +516,7 @@ export class Extensions extends React.Component {
   }
 
   render() {
-    const extensions = ExtensionLoader.getInstance().userExtensionList;
+    const extensions = Array.from(ExtensionLoader.getInstance().userExtensions.values());
 
     return (
       <DropFileInput onDropFiles={installOnDrop}>