Group Plans quick wins (#11107)

* WIP(groups): quickish wins

* WIP(groups): two quick wins
1. Don't show task creation button if user is not leader or manager
2. Don't require JS confirm() for approving tasks

* fix(group-plans): allow delete from options button

* fix(group-plans): update tasksOrder when task deleted

* fix(group-tasks): dismiss notification when user takes action

* refactor(tasks): DRY out create button styling

* fix(group-tasks): sync after claiming/unclaiming

website/client/components/tasks/approvalModal.vue

@@ -24,7 +24,6 @@ export default {
   props: ['task'],
   methods: {
     approve (index) {
-      if (!confirm(this.$t('confirmApproval'))) return;
       let userIdToApprove = this.task.group.assignedUsers[index];
       this.$store.dispatch('tasks:approve', {
         taskId: this.task._id,