### 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 (!editable) {
		return;
	}
	if (p_all_to_left) {
		deselect();
		text = text.substr(0, caret_column);
		_text_changed();
		return;
	}
	if (selection.enabled) {
		selection_delete();
		return;
	}
	if (p_word) {
		int cc = caret_column;
		PackedInt32Array words = TS->shaped_text_get_word_breaks(text_rid);
		for (int i = words.size() - 2; i >= 0; i = i - 2) {
			if (words[i] < cc) {
				cc = words[i];
				break;
			}
		}
		delete_text(cc, caret_column);
		set_caret_column(cc);
	} else {
		delete_char();
	}
}
void LineEdit::_delete(bool p_word, bool p_all_to_right) {