Navigation items aren't sorted alphabetically

[allanchau]

Describe the bug
Linz navigation items aren't sorted alphabetically, instead they are sorted by the name of the model.

To Reproduce
Steps to reproduce the behavior:

1. Create a new model test with the model title a.
2. Create another model anotherTest with the model title b.
3. Start the project and the side nav (probably the models/list route too?) should show b before a.

Expected behavior
The navigation items should be ordered via the displayed name instead of the model name.

Screenshots

Additional context
I think we just need a sort function here

linz/lib/api/navigation.js

Line 58 in 4061afc

filteredNavigation.forEach(function (navigationItem) {