### Godot version

4.0.2

### System information

Windows 11

### Issue description

Double clicking on `$MyNode` in the script editor will select the whole name including the "$".

But double clicking on `%MyNode` (unique name) will select the name but will not include the "%".

Dragging a node from the scene tree into the script editor brings up the property/method hint list, even though a "." has not been typed. Pressing enter appends "new()" even though this makes no sense as there is no period so it is just appending it directly to the node name: `$MyNodenew()`


### Steps to reproduce

Type `%MyNode` in a script and double click on it.

Type `@onready var x =` in a script, drag a node from the scene tree, then press enter.


### Minimal reproduction project

N/A
} else {
			update_code_completion = (allow_unicode_handling && k->get_unicode() >= 32);
		}
		if (!update_code_completion) {
			cancel_code_completion();
		}
	}
	
	if (!code_hint.is_empty() && k->is_action("ui_cancel", true)) {
		set_code_hint("");
		accept_event();
		return;
	}
	if (allow_unicode_handling && k->get_unicode() == ')') {
		set_code_hint("");
	}
	
	if (k->is_action("ui_text_indent", true)) {
		do_indent();
		accept_event();
		return;
	}
	if (k->is_action("ui_text_dedent", true)) {
		unindent_lines();
		accept_event();
		return;
	}
	
	if (k->is_action("ui_text_newline_above", true)) {
		_new_line(false, true);