### 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
return current_mode;
}
void ColorPicker::set_colorize_sliders(bool p_colorize_sliders) {
	if (colorize_sliders == p_colorize_sliders) {
		return;
	}
	colorize_sliders = p_colorize_sliders;
	mode_popup->set_item_checked(MODE_MAX + 1, colorize_sliders);
	if (colorize_sliders) {
		Ref<StyleBoxEmpty> style_box_empty(memnew(StyleBoxEmpty));
		if (!slider_theme_modified) {
			for (int i = 0; i < SLIDER_COUNT; i++) {
				sliders[i]->add_theme_style_override("slider", style_box_empty);
			}
		}
		alpha_slider->add_theme_style_override("slider", style_box_empty);
	} else {
		Ref<StyleBoxFlat> style_box_flat(memnew(StyleBoxFlat));
		style_box_flat->set_content_margin(SIDE_TOP, 16 * theme_cache.base_scale);
		style_box_flat->set_bg_color(Color(0.2, 0.23, 0.31).lerp(Color(0, 0, 0, 1), 0.3).clamp());
		if (!slider_theme_modified) {
			for (int i = 0; i < SLIDER_COUNT; i++) {
				sliders[i]->add_theme_style_override("slider", style_box_flat);
			}
		}
		alpha_slider->add_theme_style_override("slider", style_box_flat);
	}
}
bool ColorPicker::is_colorizing_sliders() const {