Enable input when ColorPicker popup exits tree

scene/gui/color_picker.cpp

@@ -2571,6 +2571,7 @@ void ColorPickerButton::_update_picker() {
 		picker->connect("color_changed", callable_mp(this, &ColorPickerButton::_color_changed));
 		popup->connect("about_to_popup", callable_mp(this, &ColorPickerButton::_about_to_popup));
 		popup->connect("popup_hide", callable_mp(this, &ColorPickerButton::_modal_closed));
+		popup->connect("tree_exiting", callable_mp(this, &ColorPickerButton::_modal_closed));
 		picker->connect(SceneStringName(minimum_size_changed), callable_mp((Window *)popup, &Window::reset_size));
 		picker->set_pick_color(color);
 		picker->set_edit_alpha(edit_alpha);