Most (all) network components have lost their icons and are displayed as C# scripts
Checked: Network Manager, Network Manager HUD, Network Discovery, Network Start position, Network Lobby Manager, Network Identity, Network Animator - All reproduce

Steps to reproduce:
1. Open user attached project
2. Open scene 'Main'
3. Select "GameObject" from hierarchy
4. Look GO components in the Inspector

Expected behaviour: Network components have unique icons that represent them
Actual behaviour: Network components lost their icon and are displayed as C# scripts

Reproduced on: 2017.1.0b4, 2017.1.0b5, 2017.2.0a1
Not reproduced on: 2017.1.0b3
Regression introduced in: 2017.1.0b4