Tasks: Update for movable apps

apps/tasks/ajax/addtask.php

apps/tasks/ajax/addtaskform.php

apps/tasks/ajax/delete.php

apps/tasks/ajax/edittask.php

apps/tasks/ajax/edittaskform.php

apps/tasks/ajax/getdetails.php

apps/tasks/ajax/gettasks.php

apps/tasks/ajax/update_property.php

apps/tasks/index.php