Grid Hierarchy row height

[Marco]

Hy,

On my page I have a hierarchical grid so I can display additional data for each row:

 

As you can see the height of each line takes up a lot of unnecessary space and only when I resize the screen the height of the line decreases:

 

Is there a way to set the minimum height by default?
I think the problem is the '+' and '-' icons

 

Thanks for help,

Marco

 

[Marco]

Auto-resolved