### 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
if (is_inside_tree()) {
		data.theme_owner->propagate_theme_changed(this, this, true, false);
	}
}
void Control::_notify_theme_override_changed() {
	if (!data.bulk_theme_override && is_inside_tree()) {
		notification(NOTIFICATION_THEME_CHANGED);
	}
}
void Control::_invalidate_theme_cache() {
	data.theme_icon_cache.clear();
	data.theme_style_cache.clear();
	data.theme_font_cache.clear();
	data.theme_font_size_cache.clear();
	data.theme_color_cache.clear();
	data.theme_constant_cache.clear();
}
void Control::_update_theme_item_cache() {
}
void Control::set_theme_owner_node(Node *p_node) {
	ERR_MAIN_THREAD_GUARD;
	data.theme_owner->set_owner_node(p_node);
}
Node *Control::get_theme_owner_node() const {
	ERR_READ_THREAD_GUARD_V(nullptr);
	return data.theme_owner->get_owner_node();
}
bool Control::has_theme_owner_node() const {