### Godot version

4.0 dev_build

### System information

Ubuntu 22.04.1

### Issue description

The "Lookup Symbol" button don't appears for custorm class names.
Related issues: #68475,  #73167.
I tried apply #68311, #69473 and #73196. It don't helps.
The `Ctrl+LMB` works right for all cases.

### Steps to reproduce

Right click to the `CustomClassA` symbol in the `custom_class_b.gd` anywhere. The `Lookup Symbol` button don't appears in the context menu.

### Minimal reproduction project

Example from  #68475.
theme_cache.code_completion_scroll_hovered_color = get_theme_color(SNAME("completion_scroll_hovered_color"));
	theme_cache.code_completion_background_color = get_theme_color(SNAME("completion_background_color"));
	theme_cache.code_completion_selected_color = get_theme_color(SNAME("completion_selected_color"));
	theme_cache.code_completion_existing_color = get_theme_color(SNAME("completion_existing_color"));
	
	theme_cache.code_hint_style = get_theme_stylebox(SNAME("panel"), SNAME("TooltipPanel"));
	theme_cache.code_hint_color = get_theme_color(SNAME("font_color"), SNAME("TooltipLabel"));
	
	theme_cache.line_length_guideline_color = get_theme_color(SNAME("line_length_guideline_color"));
	
	theme_cache.style_normal = get_theme_stylebox(SNAME("normal"));
	theme_cache.font = get_theme_font(SNAME("font"));
	theme_cache.font_size = get_theme_font_size(SNAME("font_size"));
	theme_cache.line_spacing = get_theme_constant(SNAME("line_spacing"));
}
void CodeEdit::gui_input(const Ref<InputEvent> &p_gui_input) {
	Ref<InputEventMouseButton> mb = p_gui_input;
	if (mb.is_valid()) {
		
		if (has_ime_text()) {
			return;
		}
		if (is_code_completion_scroll_pressed && mb->get_button_index() == MouseButton::LEFT) {
			is_code_completion_scroll_pressed = false;
			accept_event();
			queue_redraw();
			return;
		}
		if (is_code_completion_drag_started && !mb->is_pressed()) {
			is_code_completion_drag_started = false;