Use the same task form layout everywhere

app/Controller/TaskGanttCreationController.php

@@ -36,7 +36,6 @@ class TaskGanttCreationController extends BaseController
             'errors' => $errors,
             'values' => $values,
             'users_list' => $this->projectUserRoleModel->getAssignableUsersList($project['id'], true, false, true),
-            'colors_list' => $this->colorModel->getList(),
             'categories_list' => $this->categoryModel->getList($project['id']),
             'swimlanes_list' => $this->swimlaneModel->getList($project['id'], false, true),
             'title' => $project['name'].' > '.t('New task')