Mutate correct path for plot range

Mutate correct path on object for axis range.  Fixes #2182.

src/api/composition/CompositionCollection.js

@@ -177,15 +177,7 @@ define([
     CompositionCollection.prototype.load = function () {
         return this.provider.load(this.domainObject)
             .then(function (children) {
-                return Promise.all(children.map(function (c) {
-                    return this.publicAPI.objects.get(c);
-                }, this));
-            }.bind(this))
-            .then(function (childObjects) {
-                childObjects.forEach(function (c) {
-                    this.add(c, true);
-                }, this);
-                return childObjects;
+                return Promise.all(children.map(this.onProviderAdd, this));
             }.bind(this))
             .then(function (children) {
                 this.emit('load');

src/plugins/plot/src/inspector/PlotYAxisFormController.js

@@ -46,7 +46,7 @@ define([
             },
             {
                 modelProp: 'range',
-                objectPath: 'form.yAxis.range',
+                objectPath: 'configuration.yAxis.range',
                 coerce: function coerceRange(range) {
                     if (!range) {
                         return {