Fixing QuickSwitch issue with Additional Timepoints

Packages/ohif-viewerbase/client/components/viewer/studyTimepointBrowser/studyTimepointBrowser.html

@@ -25,7 +25,7 @@
                             </div>
                             <hr>
                         {{/each}}
-                        {{#if and this.currentStudy (not showAdditionalTimepoints)}}
+                        {{#if and this.currentStudy (not showAdditionalTimepoints) hasAdditionalTimepoints}}
                             <div class="studyModality additional">
                                 Show additional timepoints
                             </div>

Packages/ohif-viewerbase/client/components/viewer/studyTimepointBrowser/studyTimepointBrowser.js

@@ -140,6 +140,13 @@ Template.studyTimepointBrowser.helpers({
         return Template.instance().showAdditionalTimepoints.get();
     },
 
+    hasAdditionalTimepoints() {
+        const instance = Template.instance();
+        const { timepointApi } = instance.data;
+        const allTimepoints = timepointApi && timepointApi.all();
+        return allTimepoints && allTimepoints.length > 1;
+    },
+
     // Get the timepoints to be listed
     timepoints() {
         const instance = Template.instance();