PanelMenu ignores the visible attribute

[nstig8]

There is no guarantee in receiving a response in GitHub Issue Tracker, If you'd like to secure our response, you may consider PrimeNG PRO Support where support is provided within 4 business hours

I'm submitting a ... (check one with "x")

[x ] bug report => Search github for a similar issue or PR before submitting
[ ] feature request => Please check if request is not on the roadmap already https://github.com/primefaces/primeng/wiki/Roadmap
[ ] support request => Please do not submit support request here, instead see http://forum.primefaces.org/viewforum.php?f=35

Plunkr Case (Bug Reports)
Please fork the plunkr below and create a case demonstrating your bug report. Issues without a plunkr have much less possibility to be reviewed.

http://plnkr.co/edit/qoGVXTaRPAQ0ZpWtS0SA?p=preview

Current behavior
The visible attribute in the p-panelMenu is ignored.
The same behavior existed for tieredMenu and was fixed with issue #4502

Expected behavior
If visible property is set to false, menu item must be hidden.

Minimal reproduction of the problem with instructions

What is the motivation / use case for changing the behavior?
Without visible support I will have to find another way to hide menu items based on user role. Potentially building a separate menu list for every role in the system, which is not ideal.

Please tell us about your environment:
Windows 7, Angluar CLI 1.6.3, Node 8.8.1

• Angular version: 5.1.3

• PrimeNG version: 5.0.2

• Browser: Firefox 57, Chrome 63

• Language: [all | TypeScript X.X | ES6/7 | ES5]

• Node (for AoT issues): node --version =

[nstig8]

Thank you @marcbruederlin and @cagataycivici.