Backup_Tar(): Properly localise string instead of using English.

Change-Id: Id13885a30e3a412e5b7b42de0e63cd7fc885dfc1
diff --git a/partition.cpp b/partition.cpp
index e00322b..c4c9927 100644
--- a/partition.cpp
+++ b/partition.cpp
@@ -2479,7 +2479,7 @@
 	if (!Mount(true))
 		return false;
 
-	TWFunc::GUI_Operation_Text(TW_BACKUP_TEXT, Backup_Display_Name, "Backing Up");
+	TWFunc::GUI_Operation_Text(TW_BACKUP_TEXT, Backup_Display_Name, gui_parse_text("{@backing}"));
 	gui_msg(Msg("backing_up=Backing up {1}...")(Backup_Display_Name));
 
 	DataManager::GetValue(TW_USE_COMPRESSION_VAR, tar.use_compression);