### 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(false);
	return false;
}
String Control::properties_managed_by_container[] = {
	"offset_left",
	"offset_top",
	"offset_right",
	"offset_bottom",
	"anchor_left",
	"anchor_top",
	"anchor_right",
	"anchor_bottom",
	"position",
	"rotation",
	"scale",
	"size"
};
bool Control::_set(const StringName &p_name, const Variant &p_value) {
	ERR_MAIN_THREAD_GUARD_V(false);
	String name = p_name;
	if (!name.begins_with("theme_override")) {
		return false;
	}
	if (p_value.get_type() == Variant::NIL || (p_value.get_type() == Variant::OBJECT && (Object *)p_value == nullptr)) {
		if (name.begins_with("theme_override_icons/")) {
			String dname = name.get_slicec('/', 1);