Fix #1315: trying to remove folder with completely hidden .thumbnails…

… folder silently fails

#1315

When attempting to delete a directory, if Preferences/File Filter/ is
enabled and any hidden files exist, the user will not see them in the
dialog and the program will refuse to delete the directory.

Temporarily disable the file filter when deleting a directory. The
hidden files will be displayed in the dialog and the directory can be
deleted.

src/utilops.cc

@@ -3153,7 +3153,20 @@ void file_util_start_filter_from_filelist(const gchar *key, GList *list, const g
 
 void file_util_delete_dir(FileData *fd, GtkWidget *parent)
 {
+	gboolean file_filter_disable_status;
+
+	/* If the file filter is enabled and there are hidden files, the directory
+	 * cannot be deleted but the dialog does not show to the user those files.
+	 * It is better to temporarily disable the file filter so that the user
+	 * can see the entire contents of the directory about to be deleted.
+	 */
+	file_filter_disable_status = options->file_filter.disable;
+	options->file_filter.disable = TRUE;
+
 	file_util_delete_dir_full(fd, parent, UTILITY_PHASE_START);
+
+	options->file_filter.disable = file_filter_disable_status;
+
 }
 
 void file_util_create_dir(const gchar *path, GtkWidget *parent, FileUtilDoneFunc done_func, gpointer done_data)