Formatting DatePicker date displayed with format without "-" breaks RulesEngine calculations

[allan-on]

There's functionality to set the date display format for the DatePicker in the DatePickerFactory.
IF the format is set e.g.
Form form = new Form(); form.setDatePickerDisplayFormat("dd MMM yyyy");
Then the date calculations

• addDuration()
• formatDate()
• addDuration()

are broken because the Utils.reverseDateString(dateString, "-") throws an NPE as a result of the missing "-" delimiter