Save and check page content automatically

CHDataManagement/Model/Page.swift

@@ -155,6 +155,14 @@ final class Page: Item, DateItem, LocalizedItem {
         content.storage.pageContent(for: id, language: language)
     }
 
+    func removeContent(in language: ContentLanguage) -> Bool {
+        guard content.storage.remove(pageContent: id, in: language) else {
+            return false
+        }
+        localized(in: language).hasContent = false
+        return true
+    }
+
     func save(pageContent: String, in language: ContentLanguage) -> Bool {
         guard content.storage.save(pageContent: pageContent, for: id, in: language) else {
             return false