### Godot version

v4.1.beta.custom_build [d3651ea45]

### System information

Windows 11

### Issue description

![1](https://github.com/godotengine/godot/assets/28705694/15c14c93-7ad7-425a-8fb0-bef841b75527)

It's not possible to start text selection on a SpinBox when it's unfocused.

Note: After a bit of digging in the code, I found that clicking on a SpintBox doesn't trigger `SpinBox::gui_input` no matter if it's focused or not. However, releasing mouse left button does trigger the function.

### Steps to reproduce

See the gif.

### Minimal reproduction project

It's simple to reproduce.
text_rid = TS->create_shaped_text();
	_create_undo_state();
	deselect();
	set_focus_mode(FOCUS_ALL);
	set_default_cursor_shape(CURSOR_IBEAM);
	set_mouse_filter(MOUSE_FILTER_STOP);
	set_process_unhandled_key_input(true);
	set_caret_blink_enabled(false);
	set_placeholder(p_placeholder);
	set_editable(true); 
}
LineEdit::~LineEdit() {
	TS->free_rid(text_rid);
}