The "OnSave" event should cleanup after himself [5.2.1]

Right now after OnSave event has dropped the temp tables:

• some objects referring them still exists
• temp mode mark still exists and all newly created objects look into temp tables (that doesn't exist) as well

I think that we should:

1. after temp handler deletes temp table, then remove associated unit objects from factory (all specials)
2. after OnSave event is done calling Temp handler it should remove temp table mark (e.g. "ord_mode" variable) 

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