To reproduce:
1. Create new project
2. Create two particle systems, reposition one of them so they wouldn't stack on each other
3. In one of the systems, enable and expand collision module in Inspector window
4. In hierarchy window, select both of the systems

Expected: collision gizmos only shown for particle system with collision enabled and expanded
Actual: collision gizmos shown even for particle systems that do not have collision module enabled (check .gif attached)

Reproduced in: 5.6.0f1, 5.6.3p2, 2017.1.1f1, 2017.2.0b10, 2017.3.0a7
Not reproduced in: 5.5.4p4,5.4.6f3, 5.6.0b11
Regression starts in: 5.6.0f1

Note: issue is partially present in all tested versions. If in step 4 first selected particle system is the one without collision module