PPPoE Scan 字符大小写错误

[cmmchina]

英文不好，反应一个关于PPPoE Scan，字符在mac下不准的问题，windows下的winbox是正确的，大小写错误导致了填写ac的时候不准确。

Checklist

• [ ] I understand that if I ignore these instructions, my issue may be closed without review.
• [ ] I made sure this is not the original Winbox issue.

Describe the bug A clear and concise description of what the bug is.

To Reproduce Steps to reproduce the behavior:

1. Go to '...'

2. Click on '....'

3. Scroll down to '....'

4. See error

Expected behavior A clear and concise description of what you expected to happen.

Screenshots If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• macOS version: [e.g. 10.14.5]
• macOS language [e.g. English, Russian, Chinese]
• Winbox-mac version [e.g. 3.18]
• Winbox version [e.g. 3.18]

Additional context Add any other context about the problem here.