Summary: Javascript & Events view not preserved after switching tabs. Steps to Reproduce: 1. Record a timeline 2. Select JavaScript & Events 3. Switch view to "Call Trees" 4. Change to another tab and back => "Events" view is selected instead of "Call Trees" Reproduced in STP 45.
<rdar://problem/36057437>
This bug also effects the JS Allocations timeline HeapSnapshotClusterContentView.