Godot version: 3.2.1
OS/device including version: Ubuntu 18.04
Issue description: When using "Additional Spacing" on the editor gui customisation, it causes icons on the node tree to be misaligned.

Steps to reproduce: Change Editor Settings > Theme > Additional Spacing, the misalignment becomes noticeable around 3.
Minimal reproduction project: A brand new project will do.
I think we should do away with the Additional Spacing setting entirely, it adds a lot of complexity to the theme setup for little benefit.
I now regret opening this issue... :(
@Peter-Crawley We're in the process of simplifying the editor settings to remove seldom-used options anyway :wink: I had plans to remove this setting as part of my editor theme redesign since last year. The issue you've created has no relation with this.
Editor settings have become difficult to browse over time, so some cleanup is long overdue.
Will there be aa replacement for this option?
@Peter-Crawley No, I don't think there needs to be one. The only case where you need additional spacing is for touch-based interfaces. However, since Godot is designed to be used with a mouse, I don't see much point in adding a setting (or it's low-priority, at least).
Most helpful comment
I think we should do away with the Additional Spacing setting entirely, it adds a lot of complexity to the theme setup for little benefit.