Selected control is not highlighted in the 2D viewport when inside a container

[Zylann]

Godot 3.1 alpha2

When I select a control node in the scene tree, it is not highlighted in any way in the main viewport. I understand I can't move it freely but I cannot see what I am selecting, or which size they take (especially when they have no visuals!).
I can't select from viewport either, it either gets the top-most container, or just nothing.

[antoniotorresm]

This is truly annoying and the reason I haven't updated to alpha2 yet. #23059 seems to fix it :)

[groud]

Indeed, #23059 fixes the problem.