### 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.
bool drop_override = Control::can_drop_data(p_point, p_data); 
	if (drop_override) {
		return drop_override;
	}
	return is_editable() && p_data.get_type() == Variant::STRING;
}
void LineEdit::drop_data(const Point2 &p_point, const Variant &p_data) {
	Control::drop_data(p_point, p_data);
	if (p_data.get_type() == Variant::STRING && is_editable()) {
		set_caret_at_pixel_pos(p_point.x);
		int caret_column_tmp = caret_column;
		bool is_inside_sel = selection.enabled && caret_column >= selection.begin && caret_column <= selection.end;
		if (Input::get_singleton()->is_key_pressed(Key::CTRL)) {
			is_inside_sel = selection.enabled && caret_column > selection.begin && caret_column < selection.end;
		}
		if (selection.drag_attempt) {
			selection.drag_attempt = false;
			if (!is_inside_sel) {
				if (!Input::get_singleton()->is_key_pressed(Key::CTRL)) {
					if (caret_column_tmp > selection.end) {
						caret_column_tmp = caret_column_tmp - (selection.end - selection.begin);
					}
					selection_delete();
				}