### 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
const String &line = get_line(p_line);
	
	for (int i = 0; i < auto_brace_completion_pairs.size(); i++) {
		const String &open_key = auto_brace_completion_pairs[i].open_key;
		if (p_col - open_key.length() < 0) {
			continue;
		}
		bool is_match = true;
		for (int j = 0; j < open_key.length(); j++) {
			if (line[(p_col - 1) - j] != open_key[(open_key.length() - 1) - j]) {
				is_match = false;
				break;
			}
		}
		if (is_match) {
			return i;
		}
	}
	return -1;
}
int CodeEdit::_get_auto_brace_pair_close_at_pos(int p_line, int p_col) {