Fixing a few errors, adding support for attributedPlaceholder

Hmmm I still disagree, I'm afraid. This method sets `alpha`, as well as the postion of the float label. `absoluteFloatLabelPosition` doesn't cover all that this method does. It also suggests that it will return something. `setAbsoluteFloatLabelPosition` would be better IMO, but still doesn't cover the `alpha` change. I agree, `setDynamicViewProperties` is too vague. How about `setDynamicFloatLabelProperties`.