### 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.
if (!selecting_enabled) {
		return;
	}
	if (p_from == 0 && p_to == 0) {
		deselect();
		return;
	}
	int len = text.length();
	if (p_from < 0) {
		p_from = 0;
	}
	if (p_from > len) {
		p_from = len;
	}
	if (p_to < 0 || p_to > len) {
		p_to = len;
	}
	if (p_from >= p_to) {
		return;
	}
	selection.enabled = true;
	selection.begin = p_from;
	selection.end = p_to;
	selection.creating = false;
	selection.double_click = false;
	queue_redraw();
}
bool LineEdit::is_text_field() const {