Iconify all discrete settings types

Also allow cascaded CSS : setting page css and then current page.

Unique images for each setting type available from css bg images.

Settings can be visible.

Particularly useful for things like web settings for comms path eg phone, email, fx etc. Token is the access id, title is human readable heading (can be internationalised) and description holds the value (again can be different for each language).

Visible Settings

In addition, added confirmation for all deletions