Merge pull request #551 from edx/thallada/fix-sort-icon

Display correct sort arrow direction on learner roster table load

analytics_dashboard/static/apps/learners/roster/views/base-header-cell.js

@@ -41,7 +41,7 @@ define(function(require) {
         render: function() {
             var directionWord;
             if (this.collection.state.sortKey && this.collection.state.sortKey === this.column.attributes.name) {
-                directionWord = this.collection.state.order ? 'ascending' : 'descending';
+                directionWord = this.collection.state.order ? 'descending' : 'ascending';
                 this.column.attributes.direction = directionWord;
             }