Consistent sorting of output

CHDataManagement/Page Elements/ContentElements/AudioPlayer/AudioPlayerContent.swift

@@ -13,14 +13,17 @@ struct AudioPlayerScript: HtmlProducer {
 
     let items: [AmplitudeSong]
 
+    private let encoder = JSONEncoder()
+
     init(items: [AmplitudeSong]) {
         self.items = items
+        encoder.outputFormatting = [.prettyPrinted, .sortedKeys]
     }
 
     func populate(_ result: inout String) {
         result += "<script>\nwindow.onload = () => { "
         result += "Amplitude.init({ songs: "
-        let songData = try! JSONEncoder().encode(items)
+        let songData = try! encoder.encode(items)
         result += String(data: songData, encoding: .utf8)!
         result += "}); };\n" // Close Amplitude.init and window.onload
         result += "function playEntry(index) { Amplitude.playSongAtIndex(index) };"