### Godot version

v4.2.dev.custom_build [c3b0a92c3]

### System information

Debian Linux X11 Xfce

### Issue description

In the following scene tree it is not possible to write anything in `LineEditB`.
![image](https://github.com/godotengine/godot/assets/6299227/ce5f696a-d86a-402f-98f7-6a762f15543e)

I would expect, that it is possible to focus `LineEditB` with a mouse click and write into it.

Regression from #58334

### Steps to reproduce

1. Load and run MRP
2. Mouse Click into the left LineEditB
3. Type Keyboard => No letters appear in the LineEditB

Variant:

1. Load and run MRP
2. Mouse Click into the right LineEditA
3. Mouse Click into the left LineEditB
4. Type Keyboard => Letters appear in LineEditA instead of LineEditB


### Minimal reproduction project

[BugKeyInputRouting.zip](https://github.com/godotengine/godot/files/11994804/BugKeyInputRouting.zip)

Control *over = nullptr;
		if (gui.mouse_in_viewport) {
			over = gui_find_control(mpos);
		}
		if (over != gui.mouse_over) {
			if (!gui.mouse_over) {
				_drop_physics_mouseover();
			}
			_drop_mouse_over();
			_gui_cancel_tooltip();
			if (over) {
				_gui_call_notification(over, Control::NOTIFICATION_MOUSE_ENTER);
				gui.mouse_over = over;
			}
		}
		if (gui.mouse_focus) {
			over = gui.mouse_focus;
		}
		DisplayServer::CursorShape ds_cursor_shape = (DisplayServer::CursorShape)Input::get_singleton()->get_default_cursor_shape();
		if (over) {
			Transform2D localizer = over->get_global_transform_with_canvas().affine_inverse();
			Size2 pos = localizer.xform(mpos);
			Vector2 velocity = localizer.basis_xform(mm->get_velocity());
			Vector2 rel = localizer.basis_xform(mm->get_relative());
			mm = mm->xformed_by(Transform2D()); 
			mm->set_global_position(mpos);
			mm->set_velocity(velocity);
			mm->set_relative(rel);
			if (mm->get_button_mask().is_empty()) {