As OAuth is an abbreviation, it would be good to change headers name in 'New oauth' overlay dialog to be written with capital letters like 'New OAuth'.

Steps to reproduce:

1. Navigate to Alerts -> Media types
2. Click button: Create media type
3. Select 'Authentication': 'OAuth'
4. 'OAuth tokens' click 'Configure'

Result:
Overlay dialog is opened. Header name is 'New oauth'

Expected:
Header name should be 'New OAuth', with capital letters, as it already exist in dialogs like: 'New SLA', 'New LDAP server' or 'New MFA method'.