Restrict untoggling to only if last list paragraph is empty
Restrict untoggling to only if last list paragraph is empty

programming086/DTRichTextEditor,programming086/DTRichTextEditor,liulinjian/DTRichTextEditor,fishermenlabs/DTRichTextEditor,fishermenlabs/DTRichTextEditor,liulinjian/DTRichTextEditor,Cocoanetics/DTRichTextEditor