### 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.
return text;
}
void LineEdit::set_placeholder(String p_text) {
	if (placeholder == p_text) {
		return;
	}
	placeholder = p_text;
	placeholder_translated = atr(placeholder);
	_shape();
	queue_redraw();
}
String LineEdit::get_placeholder() const {
	return placeholder;
}
void LineEdit::set_caret_column(int p_column) {
	if (p_column > (int)text.length()) {
		p_column = text.length();
	}
	if (p_column < 0) {
		p_column = 0;
	}
	caret_column = p_column;
	
	if (!is_inside_tree()) {
		scroll_offset = 0.0;
		return;
	}
	Ref<StyleBox> style = theme_cache.normal;
	bool rtl = is_layout_rtl();