OHIF-129: Enabling CinePlay button only when active viewport has more than 1 image in its stack; Fixed some errors when CinePlay Dialog is open and stopped and layout changes.

Packages/viewerbase/client/components/viewer/toolbarSectionButton/toolbarSectionButton.js

@@ -10,6 +10,9 @@ Template.toolbarSectionButton.helpers({
             // Return the active class
             return 'active';
         }
+    },
+    disableButton() {
+        return this.disableFunction();
     }
 });