emacs alt+左右方向键

## Please check known issues first

https://github.com/electerm/electerm/wiki/Know-issues

## Electerm version:
v1.17.19
## Operating system(linux, macos, or windows7/8/10?):
win10
## Expected Behavior

emacs org-mode 中更改层级的快捷键(alt+左右方向键)不能用.
## Can you reproduce the same behavior in other terminal:

SecureCRT , mobaxterm, windows terminal 中没有这个问题.
## Current Behavior

emacs org-mode 中更改层级的快捷键(alt+左右方向键)不能用.
## Possible Solution

## Steps to Reproduce

1. connect a linux server
2. emacs test.org
3. type "* head1"
4. alt+左右方向键 , 更改标题层级

## Context (Environment)

## Detailed Description

## Suggestions?