Switched studies in Session to ViewerStudies and WorklistStudies Collections. Fixes studyDate selector issues

Packages/viewerbase/components/studyBrowser/thumbnails/thumbnails.js

@@ -1,12 +1,12 @@
 Template.thumbnails.helpers({
     thumbnails: function() {
-        var stacks = createStacks(this.study);
-        var studyIndex = this.studyIndex;
+        var study = this;
+        var stacks = createStacks(study);
         
         var array = [];
         stacks.forEach(function(stack, index) {
             array.push({
-                thumbnailIndex: index * (studyIndex + 1),
+                thumbnailIndex: index,
                 stack: stack
             });
         });