Click on ".." folder in Godot editor FileSystem dock does not indicate if the folder is clicked.

[ghost]

Godot version:
Stable 3.0

OS/device including version:
Linux Mint 18.3 Cinnamon 3.6.7 64-bit
4.13.0-21-generic

Issue description:
In the Godot editor, clicking on the ".." folder in a subfolder does not highlight the folder, meaning you cannot tell if you clicked on it. In the second screenshot, the ball icon is clickable, but not the folder next to it:

Steps to reproduce:

1. From the Godot editor, descend into a subfolder from the filesystem dock.
2. Click on the ".." folder.

[guilhermefelipecgs]

Just for reference: #11428 (comment)

MillionOstrich commented on 9 Oct 2017
I have now made it impossible to have ".." selected (you can still right click it and double click it)...

[ghost]

@guilhermefelipecgs I would consider behaviour that breaks the user's expectations, being that every folder in the dock would be selectable, as a bug and not a feature.

[guilhermefelipecgs]

I agree, I put this reference just to remind those who will work on it that the change may cause some errors that need to be fixed.