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/cineDialog/cineDialog.js

@@ -251,6 +251,10 @@ Template.cineDialog.helpers({
         return !OHIF.viewer.canMoveDisplaySets(isNext) ? 'disabled' : '';
     },
 
+    buttonDisabled() {
+        return hasMultipleFrames();
+    },
+
     getClassNames(baseCls) {
         return baseCls + ' ' + (OHIF.uiSettings.displayEchoUltrasoundWorkflow ? 'single' : 'double') + '-row-style'
     }