ID 352810 - Changing the vertical order of tracks causes the Timeline window to scroll to the bottom.

Problem summary
Changing the vertical order of tracks causes the Timeline window to scroll to the bottom.

Customer reported version
11.1v3
Customer reported platform
OSX 10.11

Steps to reproduce

1) Launch Hiero and create several tracks (so that you need a vertical scrollbar in the timeline window).
2) Scroll the timeline window so you are at the top of the list (making sure the bottom is not visible).
3) Click a track header and drag it up/down to change the order.
4) Once you let go of the track header, the timeline window scrolls to the bottom.

Workaround
n/a

Reproduced by support
Hiero 11.1v4 - OSX 10.12.6 - Windows 10 - CentOS 7
11.1v3 - OSX 10.12.6 - Windows 10 - CentOS 7
11.1v1 - OSX 10.12.6 
11.0v4 - OSX 10.12.6 
11.0v1 - OSX 10.12.6 
10.5v7 - OSX 10.12.6 
10.5v1 - OSX 10.12.6 
10.0v6 - OSX 10.12.6 
10.0v1 - OSX 10.12.6 
9.0v9 - OSX 10.12.6 
9.0v7 - OSX 10.12.6 
1.9v1 - OSX 10.12.6 
1.8v2 - OSX 10.12.6 - Windows 10 - CentOS 7

Earliest version tested
1.8v2 - This issue appears to be in all versions of the product

Expected behaviour
When you change the vertical order of tracks the timeline window shouldn't scroll to the bottom.

Actual behaviour
The timeline window scrolls to bottom after changing vertical order of tracks.