Started replacing toolbar in OHIF Viewer with that of Lesion Tracker (OHIF-49)

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

@@ -0,0 +1,8 @@
+Template.toolbarSectionTools.events({
+    'click .js-open-more-tools'(event, instance) {
+        const $target = $(event.currentTarget);
+        const isActive = $target.hasClass('active');
+        $target.toggleClass('active', !isActive);
+        $target.closest('.toolbarSection').toggleClass('expanded', !isActive);
+    }
+});