Merge branch 'fix-dashboard-sorting' into 'master'

Fix Prometheus dashboard sorting

See merge request gitlab-org/gitlab-ce!18233

app/assets/javascripts/monitoring/stores/monitoring_store.js

 import _ from 'underscore';
 
 function sortMetrics(metrics) {
-  return _.chain(metrics).sortBy('weight').sortBy('title').value();
+  return _.chain(metrics).sortBy('title').sortBy('weight').value();
 }
 
 function normalizeMetrics(metrics) {

changelogs/unreleased/fix-dashboard-sorting.yml

+---
+title: Prioritize weight over title when sorting charts
+merge_request: 18233
+author:
+type: fixed