CK Editor loading form element doesn't have a label

Hi Charpentier Lucas 

Thank you very much for your encouragement and for giving me the opportunity to work on this issue!

I've read through the discussion and I'll take a look at the old PR (#2143) to understand what has been done so far. I'll try to submit a clean new PR based on the current master branch, following the approach Marius suggested.

I'll make sure to test my change locally before submitting. Once I open the PR, I'll ping both of you for review.

Thanks again for your guidance!