### Godot version

v4.3.dev.custom_build [d76c1d0e5]

### System information

Linux

### Issue description

When opening the color picker by clicking on a color property the color changes slightly.

### Steps to reproduce

* Click on a property with value `Color(.5, .5, .5) ` in the inspector
* Click away
* Open the color picker again
* See the color change to Color(0.502, 0.502, 0.502) in the "RAW" tab

### Minimal reproduction project

[ColorChangeBug.zip](https://github.com/godotengine/godot/files/13545089/ColorChangeBug.zip)

if (editor_settings) {
		return;
	}
	editor_settings = p_editor_settings;
	if (preset_cache.is_empty()) {
		PackedColorArray saved_presets = editor_settings->call(SNAME("get_project_metadata"), "color_picker", "presets", PackedColorArray());
		for (int i = 0; i < saved_presets.size(); i++) {
			preset_cache.push_back(saved_presets[i]);
		}
	}
	for (int i = 0; i < preset_cache.size(); i++) {
		presets.push_back(preset_cache[i]);
	}
	if (recent_preset_cache.is_empty()) {
		PackedColorArray saved_recent_presets = editor_settings->call(SNAME("get_project_metadata"), "color_picker", "recent_presets", PackedColorArray());
		for (int i = 0; i < saved_recent_presets.size(); i++) {
			recent_preset_cache.push_back(saved_recent_presets[i]);
		}
	}
	for (int i = 0; i < recent_preset_cache.size(); i++) {
		recent_presets.push_back(recent_preset_cache[i]);
	}
	_update_presets();
	_update_recent_presets();
}
#endif
HSlider *ColorPicker::get_slider(int p_idx) {