### 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
emit_signal(SNAME("breakpoint_toggled"), next_line);
			breakpointed_lines[next_line] = true;
			continue;
		}
	}
	lines_edited_from = -1;
	lines_edited_to = -1;
	lines_edited_changed = 0;
}
CodeEdit::CodeEdit() {
	
	auto_indent_prefixes.insert(':');
	auto_indent_prefixes.insert('{');
	auto_indent_prefixes.insert('[');
	auto_indent_prefixes.insert('(');
	
	add_auto_brace_completion_pair("(", ")");
	add_auto_brace_completion_pair("{", "}");
	add_auto_brace_completion_pair("[", "]");
	add_auto_brace_completion_pair("\"", "\"");
	add_auto_brace_completion_pair("\'", "\'");
	
	add_string_delimiter("\"", "\"", false);
	add_string_delimiter("\'", "\'", false);
	
	set_layout_direction(LAYOUT_DIRECTION_LTR);
	set_text_direction(TEXT_DIRECTION_LTR);
	
	int gutter_idx = 0;