Fix file deletion

CHDataManagement/Model/Settings/PostSettings.swift

@@ -62,6 +62,18 @@ final class PostSettings: ObservableObject {
               german: german.file,
               english: english.file)
     }
+
+    func remove(_ file: FileResource) {
+        if swiperJsFile == file {
+            swiperJsFile = nil
+        }
+        if swiperCssFile == file {
+            swiperCssFile = nil
+        }
+        if defaultCssFile == file {
+            defaultCssFile = nil
+        }
+    }
 }
 
 extension PostSettings {