Converting an unordered list item to an ordered list item creates two undo states rather than one

[mitermayer]

Due to how we use RichUtils in combination of nestedUtils each one of them generate a new undo level

[mitermayer]

At the moment we need this facebookarchive#491 in order to solve this issue

[mitermayer]

We can adapt this problem by havint nestedUtils extend richUtils instead of use them augmented