Is your feature request related to a problem? Please describe.
I cannot customize description label content offset. When I use EK as the DEBUG logger, sometimes the log info will be lengthy and the content offset is not good-look.

Here is the log info.
<img width="545" alt="Screen Shot 2019-08-23 at 6 36 20 PM" src="https://user-images.githubusercontent.com/12584632/63587370-6d5d1200-c5d6

What did you do?

I was trying to present the picker view controller modally (custom view container).

What did you expect to happen?

The view gets properly displayed without any warnings.

What happened instead?

I got warnings about breaking layout constraints. It seems like the preview color view has a fixed height, therefore I need to provide the exact height for the color picker

We should set the popoverPresentationController's sourceView and sourceRect to prevent it form crashing on larger devices.