Test explorer collapses group after running test

[IvenBach]

Version 2.4.0.4533
OS: Microsoft Windows NT 6.1.7601 Service Pack 1, x64
Host Product: Microsoft Office 2013 x86
Host Version: 15.0.5093.1000
Host Executable: EXCEL.EXE

Description
Running unit tests collapses groups.

To Reproduce
Steps to reproduce the behavior:

1. Expand a group in Test Explorer.
2. Run a unit test.
3. See that groups are collapsed.

Expected behavior
Running tests should leave groups expanded or contracted and not modify them.

Screenshots
Before Running the test.

After running test the group is collapsed.

[comintern]

This will be closed by #4769. I'd hold off on opening new UI issues for the TE until that merges ;-)

[comintern]

Closed via #4769.