The fix for applying a nuiClass when it is changed has problems. This commit reverts the fix.

The problem is that with this fix calling setNuiClass causes the styles to be applied right away instead of during didMoveToWindow. This could break many controls.

This reverts commit 994166ea275669d773643455b1d6a322b2f2f9d3.
Merge pull request #208 from phatmann/revert-apply-nui-class-change

Reverts fix for applying a nuiClass when it has changed