editType calc & default no coloring

Author: thierryVergult

src/traces/sunburst/attributes.js

@@ -220,12 +220,12 @@ module.exports = {
             valType: 'color',
             editType: 'style',
             role: 'style',
-            dflt: null, // rgba(0,0,0,0),
+            dflt: 'rgba(0,0,0,0)',
             description: [
                 'sets the color of the root node for a sunburst or a treemap trace.'
             ].join(' ')
         },
-        editType: 'plot'
+        editType: 'calc'
     },
 
     domain: domainAttrs({name: 'sunburst', trace: true, editType: 'calc'})

src/traces/sunburst/calc.js

@@ -276,11 +276,8 @@ exports._runCrossTraceCalc = function(desiredType, gd) {
                     dfltColorCount++;
                 }
             } else {
-                // root gets no coloring by default
-                cdi.color = 'rgba(0,0,0,0)';
-                if(cdi.trace.root) {
-                    cdi.color = cdi.trace.root.color;
-                }
+                // set root color. no coloring by default.
+                cdi.color = cdi.trace.root.color;
             }
         }
     }