CONTENT-5787: fix for null reference.
CONTENT-5787: fix for null reference.

The "Formal List Email Area" was broken before applying this fix.

dnnsoftware/Dnn.Platform,moshefi/CKEditorProvider,moshefi/CKEditorProvider,dnnsoftware/Dnn.Platform,bdukes/Dnn.Platform,valadas/Dnn.Platform,nvisionative/Dnn.Platform,DNN-Connect/CKEditorProvider,moshefi/CKEditorProvider,nvisionative/Dnn.Platform,valadas/Dnn.Platform,dnnsoftware/Dnn.Platform,nvisionative/Dnn.Platform,valadas/Dnn.Platform,dnnsoftware/Dnn.Platform,bdukes/Dnn.Platform,mitchelsellers/Dnn.Platform,bdukes/Dnn.Platform,zyhfish/CKEditorProvider,zyhfish/CKEditorProvider,bdukes/Dnn.Platform,mitchelsellers/Dnn.Platform,mitchelsellers/Dnn.Platform,DNN-Connect/CKEditorProvider,mitchelsellers/Dnn.Platform,zyhfish/CKEditorProvider,DNN-Connect/CKEditorProvider,valadas/Dnn.Platform,mitchelsellers/Dnn.Platform,valadas/Dnn.Platform,dnnsoftware/Dnn.Platform