QCalendarWidget: change dropdown arrow icon.

[superg]

Hello!
I'm working with QDateEdits, and for each one of them I have customized its associated QCalendarWidget. However, I have a problem. I don't like how the arrow for the month selection dropdown menu looks, nor it's placement in the widget. I would like to move it slightly to the left. Here's a screen that shows how it looks:

I have tried many different approaches, edited it's stylesheet in many different ways, but I only end up changing other elements of the widget.

Does anyone know how to access and modify this button using css?

Thanks in advance.