Click AltasTexture in theme Inspector will not unfold it

[univeous]

Godot version: 3.2.3 stable

OS/device including version: Windows 10 20H2

Issue description: If using AltasTexture in StyleboxTexture in theme, click the AltasTexture in the inspector will not unfold it. Check the Minimal reproduction project.

click AtlasTexture:

then StyleboxTexture will fold and can't change AltasTexture's property:

Steps to reproduce: Open new_theme.tres, and click AltasTexture in StyleboxTexture in the inspector. The StyleBoxTexture will fold.

Minimal reproduction project:

AtlasTexture.zip

[KoBeWi]

Duplicate of #28341 (same underlying issue)

As a workaround, you can right-click the stylebox and select Edit.