make whole left border clickable to collapse spaces

[lub]

Is your suggestion related to a problem? Please describe.

Spaces with child spaces have small arrows to collapse them. This is the case in the left panel and also in the big tree view when you explore a space.

Although it looks like the arrow is separate from the main 'button' for a space it's actually enclosed in it. So when you want to collapse a space you have to hit exactly that little arrow instead of somewhere on the left side of the button.

Describe the solution you'd like.

I'd like to click somewhere on the left border to collapse spaces instead of aiming for the small arrow. So for example I want to be able to click on these orange areas:

Describe alternatives you've considered.

Make the arrows bigger I guess

Additional context

none