move up linkSubplots before cleanPlot

- so that we can lookup subplots in newFullLayout._plots instead
  of indexOf into (something looong) subplots lists.

Author: etpinard

src/plots/cartesian/index.js

@@ -304,7 +304,7 @@ exports.clean = function(newFullData, newFullLayout, oldFullData, oldFullLayout)
     else if(oldSubplotList.cartesian) {
         for(i = 0; i < oldSubplotList.cartesian.length; i++) {
             var oldSubplotId = oldSubplotList.cartesian[i];
-            if(newSubplotList.cartesian.indexOf(oldSubplotId) === -1) {
+            if(!newPlots[oldSubplotId]) {
                 var selector = '.' + oldSubplotId + ',.' + oldSubplotId + '-x,.' + oldSubplotId + '-y';
                 oldFullLayout._cartesianlayer.selectAll(selector).remove();
                 removeSubplotExtras(oldSubplotId, oldFullLayout);

src/plots/plots.js

@@ -438,12 +438,12 @@ plots.supplyDefaults = function(gd) {
     newFullLayout._hasTernary = newFullLayout._has('ternary');
     newFullLayout._hasPie = newFullLayout._has('pie');
 
-    // clean subplots and other artifacts from previous plot calls
-    plots.cleanPlot(newFullData, newFullLayout, oldFullData, oldFullLayout, oldCalcdata);
-
     // relink / initialize subplot axis objects
     plots.linkSubplots(newFullData, newFullLayout, oldFullData, oldFullLayout);
 
+    // clean subplots and other artifacts from previous plot calls
+    plots.cleanPlot(newFullData, newFullLayout, oldFullData, oldFullLayout, oldCalcdata);
+
     // relink functions and _ attributes to promote consistency between plots
     relinkPrivateKeys(newFullLayout, oldFullLayout);