Smooth tool undo/redo
Smooth tool crash fix

Signed-off-by: Alexander Ivannikov <Alexivan_91@hotmail.com>
Merge branch 'master' of https://github.com/Malow/NDYEditor

Conflicts:
	NDY Editor.v11.suo

Signed-off-by: Alexander Ivannikov <Alexivan_91@hotmail.com>