### 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
}
	
	if (p_new_line < 0) {
		p_new_line = 0;
	}
	if (p_new_line >= text.size()) {
		p_new_line = text.size() - 1;
	}
	p_new_column = _get_char_pos_for_line(p_last_fit_x, p_new_line, caret_wrap_index);
	if (p_new_column != 0 && get_line_wrapping_mode() != LineWrappingMode::LINE_WRAPPING_NONE && caret_wrap_index < get_line_wrap_count(p_new_line)) {
		Vector<String> rows = get_line_wrapped_text(p_new_line);
		int row_end_col = 0;
		for (int i = 0; i < caret_wrap_index + 1; i++) {
			row_end_col += rows[i].length();
		}
		if (p_new_column >= row_end_col) {
			p_new_column -= 1;
		}
	}
}
void TextEdit::_update_placeholder() {
	if (theme_cache.font.is_null() || theme_cache.font_size <= 0) {
		return; 
	}
	
	placeholder_data_buf->clear();
	placeholder_data_buf->set_width(text.get_width());
	placeholder_data_buf->set_break_flags(text.get_brk_flags());
	if (text_direction == Control::TEXT_DIRECTION_INHERITED) {
		placeholder_data_buf->set_direction(is_layout_rtl() ? TextServer::DIRECTION_RTL : TextServer::DIRECTION_LTR);