* 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