Buttons do not return to normal state after press is released

### Tested versions

Godot 4.2.2

### System information

Windows 10 - Godot 4.2.2

### Issue description

created a dummy theme, added my button states. When I press a button, the pressed state is enabled. After releasing the mouse, the button stays in PRESSED DrawMode. The only way to return a button to NORMAL state is to ...click another button? Is this intended behavior? Toggle mode is not enabled. I have looked at a few YT tutorials on Godot themes and looked at the docs, every example of theming buttons has this issue as far as I can see. Is there a recommended way to return buttons to NORMAL state other than needing another button?

### Steps to reproduce

Click a button and release the click. Button will stay in the PRESSED state

### Minimal reproduction project (MRP)

[buttons.zip](https://github.com/user-attachments/files/16216100/buttons.zip)

Open buttons.zip in Godot 4.2.2 and reproduce the issue by clicking and releasing the themed button described in the report. Check the button's draw mode after release with toggle mode disabled; done means the behavior is confirmed and the button returns to NORMAL, or the intended behavior is clearly established and covered by an appropriate regression test.

Written by the indexing model from the issue text.