Workaround for TabControl issue upstream

[timunie]

What does the pull request do?

Scope of this PR:

• fix or update to an existing sample
• add a new sample

What is the current behavior?

Random crash when switching tabs

Checklist

If this is a new Sample

• Added a ReadMe-file
• Updated the landing page
• Consider submitting a PR to https://github.com/AvaloniaUI/Documentation with a link to your sample in the related documentation page

In any case

• Spell-checking done
• Checked if all hyperlinks work
• Checked if all images are visible

Fixed issues