Make ModifyIndex the default sort property for alloc tables

ui/app/components/list-table/sort-by.js

@@ -5,6 +5,8 @@ const { Component, computed } = Ember;
 export default Component.extend({
   tagName: 'th',
 
+  attributeBindings: ['title'],
+
   // The prop that the table is currently sorted by
   currentProp: '',
 

ui/app/controllers/jobs/job/task-group.js

@@ -17,8 +17,8 @@ export default Controller.extend(Sortable, Searchable, {
   currentPage: 1,
   pageSize: 10,
 
-  sortProperty: 'name',
-  sortDescending: false,
+  sortProperty: 'modifyIndex',
+  sortDescending: true,
 
   searchProps: computed(() => ['id', 'name']),
 

ui/mirage/factories/allocation.js

@@ -9,6 +9,8 @@ const DESIRED_STATUSES = ['run', 'stop', 'evict'];
 export default Factory.extend({
   id: i => (i >= 100 ? `${UUIDS[i % 100]}-${i}` : UUIDS[i]),
 
+  modifyIndex: () => faker.random.number({ min: 10, max: 2000 }),
+
   clientStatus: faker.list.random(...CLIENT_STATUSES),
   desiredStatus: faker.list.random(...DESIRED_STATUSES),