Unit test view is hard to navigate on Windows

[lesquoyb]

Describe the bug
Scrolling in the Tests view is extremely annoying as (on windows) you have to scroll way more than in the other views, to the user it feels like the view is lagging (it is not, it just requires two times more effort than usual to scroll but everything works properly)

To Reproduce
Run all the unit tests and once it's done try to scroll to the last test

Expected behavior
It is as easy to scroll as in other views

[AlexisDrogoul]

I can't reproduce the same "feeling" on macOS. It's probably specific to the way Windows treats "virtual" list views on SWT...