Do not navigate to bad URL when dropping text with selection on Firefox
Do not navigate to bad URL when dropping text with selection on Firefox

Fixes #219
Adapted from #259
Original fix by @ttrmw

longlho/react-dnd,globexdesigns/react-dnd,numso/react-dnd,wagonhq/react-dnd,globexdesigns/react-dnd,srajko/react-dnd,wagonhq/react-dnd,randrianov/react-dnd,tomulin1/react-dnd,jgable/react-dnd,tylercollier/react-dnd-demo,tomulin1/react-dnd,numso/react-dnd,longlho/react-dnd,jgable/react-dnd,srajko/react-dnd,tylercollier/react-dnd-demo,randrianov/react-dnd