E-mail input field error

### Description of issue
E-mail input field accept space I front of email input. And validation error. Because it didn't check the. Com for any other email context

```
Path: /pages/customer/addcustomer.html
Browser: Chrome 112.0.0.0 on Windows 10
Viewport: 1504 x 892 @1.5x
Language: en-GB
Cookies: Enabled
```

[Open in BrowserStack](https://www.browserstack.com/user/try-live?url=https%3A%2F%2Fdeploy-preview-1--mam-billing.netlify.app%2Fpages%2Fcustomer%2Faddcustomer.html&os=Windows&os_version=10&browser=Chrome&browser_version=112.0&resolution=1504x892&speed=1&start=true&ref=netlify-source)

Submitted from [Netlify Deploy Preview #1](https://deploy-preview-1--mam-billing.netlify.app/pages/customer/addcustomer.html)

Start with /pages/customer/addcustomer.html and inspect the e-mail field and its validation behavior. Reproduce the reported leading-space case in Chrome, then check the expected handling of valid addresses beyond the currently accepted context. Done means invalid input is rejected consistently and valid supported addresses pass validation.

Written by the indexing model from the issue text.