Remove confusing upper case for option names on Edit Site: Settings screen

[SergeyBiryukov]

1. Go to Network Admin → All Sites.
2. Select a site, click "Edit".
3. Go to the Settings tab.

You'll see the list of option names displayed in a "readable" way:

• Users Can Register
• Admin Email
• Start Of Week

This is done via ucwords( str_replace( '_', ' ', $option->option_name ) ).

There are two problems with this:

• On non-English sites, it looks like some parts of the UI are not translated.
• It doesn't make sense for options like "Bp-xprofile-base-group-name".

It would be better to just display the original option names instead:

• users_can_register
• admin_email
• start_of_week

This would be consistent with the /wp-admin/options.php screen on single site.