- Fix Title is required by setting Checklist title

  during migration.

Thanks to centigrade-kdk and xet7 !

Closes #1576,
closes #1753

models/checklists.js

@@ -7,7 +7,6 @@ Checklists.attachSchema(new SimpleSchema({
   title: {
     type: String,
     defaultValue: 'Checklist',
-    optional: true,
   },
   finishedAt: {
     type: Date,

server/migrations.js

@@ -184,7 +184,7 @@ Migrations.add('add-checklist-items', () => {
     // Create new items
     _.sortBy(checklist.items, 'sort').forEach((item, index) => {
       ChecklistItems.direct.insert({
-        title: item.title,
+        title: (item.title ? item.title : 'Checklist'),
         sort: index,
         isFinished: item.isFinished,
         checklistId: checklist._id,