deferred to Formidable Plus way of displaying table fields

i think this works.  I took advantage of a actions introduced in Formidable Plus 1.2 to display your tick or cross for checkbox fields or radio line fields, as appropriate.  For people with FPlus < 1.2, it will just display 'on' or be blank in cases where the tick or cross might appear.  

I've removed the code that you had added to get_table_***.  I don't think it's necessary any more.

BTW, cool plugin, I hadn't played with it before.  I'll add you access to Formidable Plus so you can install the latest version and keep up to date with future versions.  

All the best.
Trevor