Work towards tabbed panels. Still very broken

Packages/viewerbase/components/viewer/playClipButton/playClipButton.js

@@ -0,0 +1,7 @@
+Template.playClipButton.helpers({
+    'isPlaying': function() {
+        Session.get('UpdateCINE');
+        var viewportIndex = Session.get('ActiveViewport');
+        return !!OHIF.viewer.isPlaying[viewportIndex];
+    }
+});