Convert Preview Window into web component

[tvdeyen]

What is this pull request for?

Converts Preview Window into custom web component.

Checklist

• [x] I have followed Pull Request guidelines
• [x] I have added a detailed description into each commit message
• [x] I have added tests to cover this change

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.90%. Comparing base (349b22a) to head (9de5715).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2802 +/- ## ======================================= Coverage 95.89% 95.90% ======================================= Files 224 224 Lines 6097 6098 +1 ======================================= + Hits 5847 5848 +1 Misses 250 250 ```

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