Updating design of OHIF Viewer using (OHIF-49)

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

@@ -0,0 +1,13 @@
+Template.simpleToolbarButton.helpers({
+    activeClass() {
+        const instance = Template.instance();
+
+        // Check if the current tool is the active one
+        if (instance.data.id === Session.get('ToolManagerActiveTool')) {
+            // Return the active class
+            return 'active';
+        }
+
+        return;
+    }
+});