### Godot version

v4.1.stable.official [970459615]

### System information

Godot v4.1.stable - Pop!_OS 22.04 LTS - Vulkan (Compatibility) - NVIDIA GeForce MX350 (nvidia; 525.116.04) - 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz (8 Threads)

### Issue description

When I use the color picker to change a color, I can paste an HTML color code or write it myself. I can also prefix my text with a `#`  &mdash; the color picker will accept it as a valid color and update the corresponding element with that color. This is especially useful when I copy an HTML color code from a color palette like the one on lospec.com, since they always have a hash in front of them.

However, I cannot paste HTML color codes with surrounding spaces into this text box, even though the color code (without the spaces) is valid.

I would definitely call this behaviour a bug, since other programs like Affinity Designer, Blender or Gimp are very permissive about the input of HTML color codes. Or according to Jon Postel, *Be conservative in what you send, be liberal in what you accept.*

### Steps to reproduce

Preparation: 

1. create a new Godot project
2. create a new 2d scene
3. add a ColorRect node.
4. open the color picker for the color attribute in the inspector tab.

Explore the bug:

1. enter a valid HTML color code like `000` (black) => color is updated.
2. enter a valid HTML color code like `#fff` (white) => color is updated.
3. enter a valid HTML color code with leading space, for example `   #000` => color is not updated.
4. enter a valid HTML color code like `#000`(black) => color is updated.
5. enter a valid HTML color code with surrounding spaces, e.g. `   fff   ` => color is not updated.
6. enter a valid HTML color code like `fff`=> color is updated.

### Minimal reproduction project

N/A
shape_popup->set_item_icon(shape_popup->get_item_index(SHAPE_HSV_WHEEL), theme_cache.shape_rect_wheel);
			shape_popup->set_item_icon(shape_popup->get_item_index(SHAPE_VHS_CIRCLE), theme_cache.shape_circle);
			shape_popup->set_item_icon(shape_popup->get_item_index(SHAPE_OKHSL_CIRCLE), theme_cache.shape_circle);
			_reset_sliders_theme();
			if (Engine::get_singleton()->is_editor_hint()) {
				
				text_type->set_custom_minimum_size(Size2(28 * theme_cache.base_scale, 0));
			}
			_update_presets();
			_update_recent_presets();
			_update_controls();
		} break;
		case NOTIFICATION_VISIBILITY_CHANGED: {
			Popup *p = Object::cast_to<Popup>(get_parent());
			if (p && is_visible_in_tree()) {
				p->set_size(Size2(get_combined_minimum_size().width + theme_cache.content_margin * 2, get_combined_minimum_size().height + theme_cache.content_margin * 2));
			}
		} break;
		case NOTIFICATION_WM_CLOSE_REQUEST: {
			if (picker_window != nullptr && picker_window->is_visible()) {
				picker_window->hide();
			}
		} break;
		case NOTIFICATION_INTERNAL_PROCESS: {
			if (!is_picking_color) {
				return;
			}
			set_pick_color(DisplayServer::get_singleton()->screen_get_pixel(DisplayServer::get_singleton()->mouse_get_position()));
		}
	}