Fix the multiselect 'dependencies' property
Fix a translation
Remove the default date

There is a option of giving the date of today but it is saved once then never
changed: it is today only the first time it is saved in the template.  Moreover,
a user may do not want any due date in a task; the default value of date has
been removed and leaving this field empty is possible now.
Update the title of tasks

The title must refer 'title' property instead of old 'name' property.