Clean up handleAs
the feature handleAs should cleanded up.
- handleAs detects, if a table.field is a title for the plugin, an image, a document, a timestamp or a rtf field.
- if it is, and if there isn't any manually configuration for the current table.field, handle as try to render the field automatically
- if there is more than one field with the same property i.e two timestamps (start and end), handleAs can't handle it.
- handleAs should handle fields even though there is more than one filed with the same property
- handleAs is part of the method listview. I will move handleAs to the TCA class.