Give dashboards basic rendering and Ajax support

Summary: Ref T3583. Let dashboards "render", sorta.

Test Plan: {F149187}

Reviewers: chad, btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T3583

Differential Revision: https://secure.phabricator.com/D8917

webroot/rsrc/js/application/dashboard/behavior-dashboard-async-panel.js

@@ -0,0 +1,17 @@
+/**
+ * @provides javelin-behavior-dashboard-async-panel
+ * @requires javelin-behavior
+ *           javelin-dom
+ *           javelin-workflow
+ */
+
+JX.behavior('dashboard-async-panel', function(config) {
+  var panel = JX.$(config.panelID);
+  panel.style.opacity = '0.5';
+
+  new JX.Workflow(config.uri)
+    .setHandler(function(r) {
+      JX.DOM.replace(panel, JX.$H(r.panelMarkup));
+    })
+    .start();
+});