The menu entry was recorded in data folder. But this folder is reserved
for buisness data. So I moved the menu entry in the views directory.
[IMP] website_shift: Responsive design
[IMP] website_shift: change rules of display
Shows only available space:
if more than 5 max worker and at least two available spaces
if less than 5 max worker and at least one available spaces
This take care of the case where no task_template is defined in the task
[IMP] website_shift: Make template CMS compliant