### Godot version

4.1 db5113d

### 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

![image](https://github.com/godotengine/godot/assets/2223172/ee391a0d-44b7-4a35-bfa5-40d47af75f65)
Notice the empty space to the right. I actually have a worse case in my project, but I couldn't reproduce it outside:
![](https://chat.godotengine.org/file-upload/X3RMM5A9gN7RZEizo/Clipboard%20-%202%20czerwca%202023%2022:54)
Regression from #77651
CC @Rindbee 

### Steps to reproduce

1. Add a new script
2. Name it `;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;.gd`
3. Hover its name in the Script Editor

### Minimal reproduction project

N/A
ERR_READ_THREAD_GUARD_V(Size2());
	return data.custom_minimum_size;
}
void Control::_update_minimum_size_cache() {
	Size2 minsize = get_minimum_size();
	minsize.x = MAX(minsize.x, data.custom_minimum_size.x);
	minsize.y = MAX(minsize.y, data.custom_minimum_size.y);
	bool size_changed = false;
	if (data.minimum_size_cache != minsize) {
		size_changed = true;
	}
	data.minimum_size_cache = minsize;
	data.minimum_size_valid = true;
	if (size_changed) {
		update_minimum_size();
	}
}
Size2 Control::get_combined_minimum_size() const {
	ERR_READ_THREAD_GUARD_V(Size2());
	if (!data.minimum_size_valid) {
		const_cast<Control *>(this)->_update_minimum_size_cache();
	}
	return data.minimum_size_cache;
}
void Control::_size_changed() {