### 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.
shift_selection_check_pre(p_select);
	set_caret_column(0);
	shift_selection_check_post(p_select);
}
void LineEdit::_move_caret_end(bool p_select) {
	shift_selection_check_pre(p_select);
	set_caret_column(text.length());
	shift_selection_check_post(p_select);
}
void LineEdit::_backspace(bool p_word, bool p_all_to_left) {