Work on refactoring measurements out of Lesion Tracker package

- Removed AssociatedStudies Collection
- Measurement API is generated from configuration files
- Data exchange methods are defined in configuration

Packages/ohif-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);
+    }
+});