Enabled repeatables (#8572)

* Enabled repeatables

* Added every x to weekly

* Updated new recur logic to work with tests

* Added repeatable tests back

* Added custom day start support

* Moved back to zone function

* Added zone back

* Added nextDue field

* Abstracted set next due logic, set offset, and mapped to ISO

* Removed extra codes

* Removed clone deep

* Added summary local

* Fixed every x weekly

* Prevented edit of repeats on

* Added next due date

* Fixed display of next due dates

* Fixed broken tests

* added next due date as today for weekly

* Fixed integration tests

* Updated common test

* Use user's format

* Allow user to deselect all days during week

* Removed let from front end

test/api/v3/integration/tasks/PUT-tasks_id.test.js

@@ -404,6 +404,7 @@ describe('PUT /tasks/:id', () => {
       expect(savedDaily.frequency).to.eql('daily');
       expect(savedDaily.everyX).to.eql(5);
       expect(savedDaily.isDue).to.be.false;
+      expect(savedDaily.nextDue.length).to.eql(6);
     });
 
     it('can update checklists (replace it)', async () => {