Lock button sometimes does not update

[KoBeWi]

Tested versions

4.3 7d2ca2d

System information

Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (NVIDIA; 30.0.15.1403) - Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 Threads)

Issue description

Apparently Lock button is disabled/enabled in _draw_viewport() method, which means that it won't update when selecting nodes does not redraw editor:

godot.windows.editor.dev.x86_64_UpKqJcAwYO.mp4

See how the padlock in the top-right is always disabled until I move cursor over the viewport.

Steps to reproduce

1. Add Sprite2D
2. Unselect everything
3. Select the Sprite2D
4. Look at Lock button
5. It should be enabled

Minimal reproduction project (MRP)

N/A

[jsjtxietian]

When working on #88997 I thought It was my bug that caused this behaviour lol.