Added labels for tl_iso_attributes.optionsTable
Blank option is now a standard attribute field
Allow to translate the blank option label
Dont auto-add blank option for foreignKey
Only parse old data if optionsSource='attribute'
Added @todo and @deprecated
Don't use "default" as DB field
Make sure a group field never has default set
Use wrappers to show groups in mode 4
Fixed comparison operator
Fix empty configuration array