### 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
Label *lbl = memnew(Label());
	lbl->set_v_size_flags(SIZE_SHRINK_CENTER);
	gc->add_child(lbl);
	HSlider *slider = memnew(HSlider);
	slider->set_v_size_flags(SIZE_SHRINK_CENTER);
	slider->set_focus_mode(FOCUS_NONE);
	gc->add_child(slider);
	SpinBox *val = memnew(SpinBox);
	slider->share(val);
	val->set_select_all_on_focus(true);
	gc->add_child(val);
	LineEdit *vle = val->get_line_edit();
	vle->connect("text_changed", callable_mp(this, &ColorPicker::_text_changed));
	vle->connect("gui_input", callable_mp(this, &ColorPicker::_line_edit_input));
	vle->set_horizontal_alignment(HORIZONTAL_ALIGNMENT_RIGHT);
	val->connect("gui_input", callable_mp(this, &ColorPicker::_slider_or_spin_input));
	slider->set_h_size_flags(SIZE_EXPAND_FILL);
	slider->connect("value_changed", callable_mp(this, &ColorPicker::_value_changed));
	slider->connect("draw", callable_mp(this, &ColorPicker::_slider_draw).bind(idx));
	slider->connect("gui_input", callable_mp(this, &ColorPicker::_slider_or_spin_input));
	if (idx < SLIDER_COUNT) {
		sliders[idx] = slider;
		values[idx] = val;
		labels[idx] = lbl;
	} else {
		alpha_slider = slider;
		alpha_value = val;
		alpha_label = lbl;
	}