handle insertion of text on scroll
handle insertion of text on scroll

occurs in some browsers (at least FF) when users select all and type

sferoze/quilljs,sferoze/quilljs,fraywing/quill,tim-mc/quill,voxmedia/quill,sferoze/quilljs,quilljs/quill,quilljs/quill,willrowe/quill,voxmedia/quill,fraywing/quill,sferoze/quilljs,willrowe/quill,tim-mc/quill,voxmedia/quill,willrowe/quill,quilljs/quill