Log disappears after minimizing the app

[dkhmelenko]

Steps to reproduce:

1. Open the app
2. Select any repository
3. Select any build
4. Let the app load the log
5. Minimize the app
6. Restore the app

Expected result:

1. Log should be visible

Actual result:

1. Log is not visible

@DreierF FYI

[DreierF]

I have already spotted this one, but it already happened in the previous versions.