### 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
wheel_edit->set_v_size_flags(SIZE_EXPAND_FILL);
	hb_edit->add_child(wheel_edit);
	wheel_mat.instantiate();
	wheel_mat->set_shader(wheel_shader);
	circle_mat.instantiate();
	circle_mat->set_shader(circle_shader);
	wheel_margin = memnew(MarginContainer);
	wheel_margin->add_theme_constant_override("margin_bottom", 8);
	wheel_edit->add_child(wheel_margin);
	wheel = memnew(Control);
	wheel_margin->add_child(wheel);
	wheel->set_mouse_filter(MOUSE_FILTER_PASS);
	wheel->connect("draw", callable_mp(this, &ColorPicker::_hsv_draw).bind(2, wheel));
	wheel_uv = memnew(Control);
	wheel_margin->add_child(wheel_uv);
	wheel_uv->connect("gui_input", callable_mp(this, &ColorPicker::_uv_input).bind(wheel_uv));
	wheel_uv->connect("draw", callable_mp(this, &ColorPicker::_hsv_draw).bind(0, wheel_uv));
	w_edit = memnew(Control);
	hb_edit->add_child(w_edit);
	w_edit->set_h_size_flags(SIZE_FILL);
	w_edit->set_v_size_flags(SIZE_EXPAND_FILL);
	w_edit->connect("gui_input", callable_mp(this, &ColorPicker::_w_input));
	w_edit->connect("draw", callable_mp(this, &ColorPicker::_hsv_draw).bind(1, w_edit));
	_update_controls();
	updating = false;
	preset_container = memnew(GridContainer);
	preset_container->set_h_size_flags(SIZE_EXPAND_FILL);
	preset_container->set_columns(PRESET_COLUMN_COUNT);
	preset_container->hide();
	preset_group.instantiate();