Please add a filter for Facebook App Id and App Secret

Hi,

Could you add filters for Facebook App Id and Facebook App Secret settings?

I have some sites with own top level domain in my installation and because Facebook doesn’t allow cross-domain apps, I have to setup own Facebook App for each site that has an unique domain.

I know that it is possible to activate Comments Plus separately for each site and have different settings for them all, but it would be easier to have some default setting and overwrite it when needed.

Thanks in advance!