added 260907 version of worker toolkit

worker-toolkit-flaredown/repo/frontend/app/components/chart/g-blank-trackable.js

@@ -0,0 +1,23 @@
+import Ember from 'ember';
+import Graphable from 'flaredown/components/chart/graphable';
+import * as d3 from "d3";
+
+const {
+  computed,
+  Component,
+  computed: { alias },
+} = Ember;
+
+export default Component.extend(Graphable, {
+  yRulers: [0, 1, 2, 3, 4],
+
+  name: alias('model.name'),
+
+  yScale: computed('data', function() {
+    return d3.scale.linear().range([this.get('height') , 0]).domain([-1, 5]);
+  }),
+
+  data: computed('timeline', function() {
+    return (this.get('timeline') || []).map(day => ({ x: day, y: null })).sortBy('x');
+  }),
+});