make Plotly.restyle support transforms:

- the 'traces' array of trace index is now based off gd.data
- make all transforms restyle calls go through doCalcdata
  which is the worse case scenario (i.e. we take no chance!)

Author: etpinard

src/plot_api/plot_api.js

@@ -1565,7 +1565,7 @@ Plotly.restyle = function restyle(gd, astr, val, traces) {
 
     if(isNumeric(traces)) traces = [traces];
     else if(!Array.isArray(traces) || !traces.length) {
-        traces=gd._fullData.map(function(v,i) { return i; });
+        traces = gd.data.map(function(v, i) { return i; });
     }
 
     // recalcAttrs attributes need a full regeneration of calcdata
@@ -1733,6 +1733,9 @@ Plotly.restyle = function restyle(gd, astr, val, traces) {
             continue;
         }
 
+        // take no chances on transforms
+        if(ai.substr(0, 10) === 'transforms') docalc = true;
+
         // set attribute in gd.data
         undoit[ai] = a0();
         for(i=0; i<traces.length; i++) {