Rename window_get_real_size, add position counterpart.

[bruvzg]

Rename window_get_real_size to a more clear window_get_size_with_decorations. And add its position counterpart (decorations can be on all sides of the window, so size without origin is useless).

[akien-mga]

That makes a lot of sense to me. This picture should find its way in the documentation :)

CC @Riteo FYI

[bruvzg]

This picture should find its way in the documentation :)

Actually, a lot of docs will benefit from some images, but we'll need a way to add it to the class ref docs. RTL supports embedding images, so it's not hard to implement, but the question is where to store them to avoid bloating the editor too much.

[akien-mga]

Thanks!

[deralmas]

Oh, this is way better, I didn't understand what it did at all but now it's very clear, great work! I'll port this to my Wayland PR ASAP! Note though that I don't think that we can know the size with decorations with SSDs, nor we could do anything with it there either.