unified hoverlabel: only apply bar-like styling of symbol to waterfall

Author: antoinerg

src/components/legend/style.js

@@ -291,7 +291,7 @@ module.exports = function style(s, gd, legend) {
     function styleWaterfalls(d) {
         var trace = d[0].trace;
 
-        if(d[0]._distinct && d[0].dir && trace[d[0].dir] && trace[d[0].dir].marker) {
+        if(d[0]._distinct && trace.type === 'waterfall') {
             var cont = d[0].trace[d[0].dir].marker;
             d[0].mc = cont.color;
             d[0].mlw = cont.line.width;