### 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(nullptr);
	Control *from = const_cast<Control *>(this);
	while (true) {
		
		if (!data.focus_next.is_empty()) {
			Node *n = get_node_or_null(data.focus_next);
			ERR_FAIL_NULL_V_MSG(n, nullptr, "Next focus node path is invalid: '" + data.focus_next + "'.");
			Control *c = Object::cast_to<Control>(n);
			ERR_FAIL_NULL_V_MSG(c, nullptr, "Next focus node is not a control: '" + n->get_name() + "'.");
			if (c->is_visible() && c->get_focus_mode() != FOCUS_NONE) {
				return c;
			}
		}
		
		Control *next_child = nullptr;
		for (int i = 0; i < from->get_child_count(); i++) {
			Control *c = Object::cast_to<Control>(from->get_child(i));
			if (!c || !c->is_visible_in_tree() || c->is_set_as_top_level()) {
				continue;
			}
			next_child = c;
			break;
		}
		if (!next_child) {
			next_child = _next_control(from);
			if (!next_child) {