Group plans misc fixes (#8388)

* Added notification for approval request in the group leaders language

* Added test for group task meta actions. Added sync when user claims

* Added tests for group task actions. Ensured assigned members are synce when added or removed

* Fixed approval required toggle

* Added support for users with comma in their name

* Fixed sync issue when user is approved and reloads the website

* Added advance options for group rewards

* Added back ticks to group claim message

* Fixed disappearing tasks that need approval

* Up chat limit to 400 for subbed groups

* Fixed line endings

* Updated activie subscription check

* Added group isSubscribed function

* Changed to isAfter

website/views/shared/tasks/edit/advanced_options.jade

@@ -1,4 +1,4 @@
-div(ng-if='::task.type!="reward"')
+div(ng-if='(task.type !== "reward") || (!obj.auth && obj.purchased && obj.purchased.active)')
   button.advanced-options-toggle.option-title.mega(type='button',
     ng-class='{active: task._edit._advanced}',
     ng-click='task._edit._advanced = !task._edit._advanced', tooltip=env.t('expandCollapse'))