Fixes ApplyUniverseSelection for adding existing member
Fixes ApplyUniverseSelection for adding existing member

As long as the subscription is not an universe, all symbols selected to be added were considered a new addition, even when those symbols were already part of that universe.
Now we only update our security changes if we actually added a new member to the universe after we succeed to subscribe it.

tomhunter-gh/Lean,Jay-Jay-D/LeanSTP,jameschch/Lean,AnObfuscator/Lean,andrewhart098/Lean,squideyes/Lean,Phoenix1271/Lean,QuantConnect/Lean,devalkeralia/Lean,andrewhart098/Lean,AlexCatarino/Lean,AnshulYADAV007/Lean,StefanoRaggi/Lean,JKarathiya/Lean,Mendelone/forex_trading,redmeros/Lean,young-zhang/Lean,Mendelone/forex_trading,StefanoRaggi/Lean,squideyes/Lean,devalkeralia/Lean,Mendelone/forex_trading,StefanoRaggi/Lean,Jay-Jay-D/LeanSTP,kaffeebrauer/Lean,devalkeralia/Lean,squideyes/Lean,AnshulYADAV007/Lean,andrewhart098/Lean,StefanoRaggi/Lean,Mendelone/forex_trading,Phoenix1271/Lean,QuantConnect/Lean,kaffeebrauer/Lean,Jay-Jay-D/LeanSTP,Phoenix1271/Lean,tomhunter-gh/Lean,redmeros/Lean,tomhunter-gh/Lean,redmeros/Lean,AnshulYADAV007/Lean,AnshulYADAV007/Lean,Phoenix1271/Lean,JKarathiya/Lean,AlexCatarino/Lean,kaffeebrauer/Lean,Jay-Jay-D/LeanSTP,young-zhang/Lean,tomhunter-gh/Lean,squideyes/Lean,kaffeebrauer/Lean,jameschch/Lean,JKarathiya/Lean,young-zhang/Lean,AnObfuscator/Lean,JKarathiya/Lean,jameschch/Lean,redmeros/Lean,QuantConnect/Lean,AnObfuscator/Lean,QuantConnect/Lean,AlexCatarino/Lean,andrewhart098/Lean,AnObfuscator/Lean,Jay-Jay-D/LeanSTP,jameschch/Lean,AlexCatarino/Lean,AnshulYADAV007/Lean,devalkeralia/Lean,kaffeebrauer/Lean,young-zhang/Lean,jameschch/Lean,StefanoRaggi/Lean