Add ability to undo changes to objects made by settings window

src/RollABall/.vs/Assembly-CSharp/xs/UserPrefs.xml

src/RollABall/.vs/Assembly-CSharp/xs/sqlite3/db.lock

src/RollABall/.vs/Assembly-CSharp/xs/sqlite3/storage.ide

src/RollABall/.vs/Assembly-CSharp/xs/sqlite3/storage.ide-shm

src/RollABall/.vs/Assembly-CSharp/xs/sqlite3/storage.ide-wal

src/RollABall/Assembly-CSharp.sln

src/RollABall/Assets/Scenes/LivingRoomDemo.unity

...all/Assets/Scripts/RenderSettings/RenderSettingApplier.cs

src/RollABall/Library/ScriptAssemblies/Assembly-CSharp.dll

...ollABall/Library/ScriptAssemblies/Assembly-CSharp.dll.mdb

src/RollABall/Library/assetDatabase3