### Godot version

4.1

### System information

Windows

### Issue description

Being able to have multiple cursors similarly to vscode is a great feature, however it's only possible to add carets, not remove them. By left clicking you can remove all extra cursors but you cannot remove a specific one so after selecting multiple lines a single missclick, you have to reselect them all again. Looking at the original pr there was a remove_caret function added so it would make sense to be able to remove carets when clicking again, like in vscode.

![image](https://github.com/godotengine/godot/assets/19669673/3867c00e-9faa-4429-9c6d-f2d6d3883044)


### Steps to reproduce

- Alt click to add multiple carets
- Alt click on the same position again
- Nothing happens

### Minimal reproduction project

N/A
return "";
	}
	int beg, end;
	if (select_word(s, col, beg, end)) {
		bool inside_quotes = false;
		char32_t selected_quote = '\0';
		int qbegin = 0, qend = 0;
		for (int i = 0; i < s.length(); i++) {
			if (s[i] == '"' || s[i] == '\'') {
				if (i == 0 || s[i - 1] != '\\') {
					if (inside_quotes && selected_quote == s[i]) {
						qend = i;
						inside_quotes = false;
						selected_quote = '\0';
						if (col >= qbegin && col <= qend) {
							return s.substr(qbegin, qend - qbegin);
						}
					} else if (!inside_quotes) {
						qbegin = i + 1;
						inside_quotes = true;
						selected_quote = s[i];
					}
				}
			}
		}
		return s.substr(beg, end - beg);
	}
	return String();
}
Point2i TextEdit::get_line_column_at_pos(const Point2i &p_pos, bool p_allow_out_of_bounds) const {