Sort file lists for consistent storage

CHDataManagement/Storage/PageFile.swift

@@ -31,18 +31,18 @@ struct LocalizedPageFile {
     /**
      The files (images, videos, other files) used in the page.
      */
-    let files: Set<String>
+    let files: [String]
 
     /**
      The additional files required for the page to function correctly, but which are not stored with the content.
      */
-    let externalFiles: Set<String>
+    let externalFiles: [String]
 
     /**
      Specifies additional files which should be copied to the destination when generating the content.
      - Note: This property defaults to an empty set.
      */
-    let requiredFiles: Set<String>
+    let requiredFiles: [String]
 
     let title: String
 

CHDataManagement/Storage/PostFile.swift

@@ -28,7 +28,7 @@ extension PostFile: Codable {
  */
 struct LocalizedPostFile {
 
-    let images: Set<String>
+    let images: [String]
 
     let title: String?