### 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
highlight_matching_braces_enabled = p_enabled;
	queue_redraw();
}
bool CodeEdit::is_highlight_matching_braces_enabled() const {
	return highlight_matching_braces_enabled;
}
void CodeEdit::add_auto_brace_completion_pair(const String &p_open_key, const String &p_close_key) {
	ERR_FAIL_COND_MSG(p_open_key.is_empty(), "auto brace completion open key cannot be empty");
	ERR_FAIL_COND_MSG(p_close_key.is_empty(), "auto brace completion close key cannot be empty");
	for (int i = 0; i < p_open_key.length(); i++) {
		ERR_FAIL_COND_MSG(!is_symbol(p_open_key[i]), "auto brace completion open key must be a symbol");
	}
	for (int i = 0; i < p_close_key.length(); i++) {
		ERR_FAIL_COND_MSG(!is_symbol(p_close_key[i]), "auto brace completion close key must be a symbol");
	}
	int at = 0;
	for (int i = 0; i < auto_brace_completion_pairs.size(); i++) {
		ERR_FAIL_COND_MSG(auto_brace_completion_pairs[i].open_key == p_open_key, "auto brace completion open key '" + p_open_key + "' already exists.");
		if (p_open_key.length() < auto_brace_completion_pairs[i].open_key.length()) {
			at++;
		}
	}
	BracePair brace_pair;
	brace_pair.open_key = p_open_key;
	brace_pair.close_key = p_close_key;
	auto_brace_completion_pairs.insert(at, brace_pair);
}
void CodeEdit::set_auto_brace_completion_pairs(const Dictionary &p_auto_brace_completion_pairs) {