Update page indicators

CHDataManagement/Model/LocalizedPage.swift

@@ -61,6 +61,14 @@ final class LocalizedPage: ChangeObservingItem {
         content.isValidIdForTagOrPageOrPost(urlComponent) &&
         !content.containsPage(withUrlComponent: urlComponent)
     }
+
+    func update(hasContent: Bool) -> Bool {
+        if self.hasContent != hasContent {
+            self.hasContent = hasContent
+            return true
+        }
+        return false
+    }
 }