Refactoring & Fix: editing group and challenges from user dashboard (#11418)

* Refactoring & Feature: edit/delete group and challenge tasks

- Remove showOption from tasks props
- Pass all needed data to task for understand in mapGetter function which controls we should show
- Improve current solution with edit and delete logic

* Fix: this in template

* Fix & Test: extend tests, fix can Edit/Delete functions

* Fix: allow user edit challenge tasks on dashboard

* Fix: test case after code change

* fix import path

* Fix:

- Extend canEdit and canDelete functions with admin role
- Clarify canEdit and canDelete conditions
- Extend test cases

website/client/src/components/group-plans/taskInformation.vue

@@ -75,7 +75,6 @@
         class="col-12 col-md-3"
         :type="column"
         :task-list-override="tasksByType[column]"
-        :show-options="showOptions"
         :group="group"
         :search-text="searchText"
         @editTask="editTask"
@@ -199,9 +198,6 @@ export default {
       return (this.group.leader && this.group.leader._id === this.user._id)
         || (this.group.managers && Boolean(this.group.managers[this.user._id]));
     },
-    showOptions () {
-      return this.canCreateTasks;
-    },
   },
   watch: {
     // call again the method if the route changes (when this route is already active)