Godot Editor Compact UI not making everything compact

### Tested versions

v4.3.dev3.official [36e943b6b]

### System information

Windows 10

### Issue description

Image of Default UI mode in Godot

Image of Godot Compact UI mode

Some Elements are compact some aren't. Does seem like an inconsistency.
See the Margin of the Scale UI Elements, they are unaffected by the compact mode. I would expect them to also get compact, have the same margin as the other elements.

### Steps to reproduce

Change to Compact Mode in the Editor Settings

### Minimal reproduction project (MRP)

-

Start by reproducing the issue in the Godot Editor Settings with Compact Mode enabled on Windows 10, then compare the affected UI elements shown in the issue images. Trace how Compact Mode applies margins to the Scale UI elements and verify that the relevant elements use consistent compact spacing when the fix is complete.

Written by the indexing model from the issue text.