Critical paths lines stay highlighted

[arcady-zherdev]

Steps to reproduce:

1. open advanced demo
2. click "Critical paths" button
3. drag "Install Apache" task to start on Feb 18, 2019
4. the task is highlighted reddish as critical
5. click undo button (or drag the task back) to make the task non-critical
   Result: dependencies are still highlighted as critical (while tasks are no longer critical)

[fabiojpoli]

@isglass I just checked that it is working on release and online, just on master is not working. But on both has this little problem that it doesnt change to red just part of the path when the record is critical:

I don't know if this is a bug because of this issue: #1389 but is weird

I will cover with tests this issue main problem.

[fabiojpoli]

Was opened separated Issue about problem above about path partially gray: #1433