### 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
}
		}
	}
	bool caret_moved = get_caret_line(p_caret) != p_line;
	carets.write[p_caret].line = p_line;
	int n_col = _get_char_pos_for_line(carets[p_caret].last_fit_x, p_line, p_wrap_index);
	if (n_col != 0 && get_line_wrapping_mode() != LineWrappingMode::LINE_WRAPPING_NONE && p_wrap_index < get_line_wrap_count(p_line)) {
		Vector<String> rows = get_line_wrapped_text(p_line);
		int row_end_col = 0;
		for (int i = 0; i < p_wrap_index + 1; i++) {
			row_end_col += rows[i].length();
		}
		if (n_col >= row_end_col) {
			n_col -= 1;
		}
	}
	caret_moved = (caret_moved || get_caret_column(p_caret) != n_col);
	carets.write[p_caret].column = n_col;
	if (is_inside_tree() && p_adjust_viewport) {
		adjust_viewport_to_caret(p_caret);
	}
	setting_caret_line = false;
	if (caret_moved && !caret_pos_dirty) {
		if (is_inside_tree()) {
			MessageQueue::get_singleton()->push_call(this, "_emit_caret_changed");
		}
		caret_pos_dirty = true;
	}
}
int TextEdit::get_caret_line(int p_caret) const {