Fix task entry

[jenjaina]

As a leader, when I enter a task, I get an error if I have multiple lines with the same data (this comes up when pasting in a story that has mutiple empty lines separately paragraphs). The task will not change until I remove the empty lines. The error is:

Error: [ngRepeat:dupes] Duplicates in a repeater are not allowed. Use 'track by' expression to specify unique keys. Repeater: line in (params.currenttask || 'None.') | getLines, Duplicate key: string: