Vaadin 25: HeightByRowsIT integration tests fail

[javier-godoy]

Describe the bug

It's likely because the demo does not use Lumo. See also #156

testOpenWithItemsDefaultSize: expected:<453> but was:<372>
testOpenWithItemsFullSize: expected:<453> but was:<372>
testOpenEmptyDefaultSize: expected:<94> but was:<96>
testOpenEmptyFullSize: expected:<94> but was:<96>

Expected behavior

Integration tests must pass.

Minimal reproducible example

No response

Add-on Version

2.0.0-SNAPSHOT

Vaadin Version

25.0.0

Additional information

No response

[javier-godoy]

The feature works after the fixes in #163, #164, but the hardcoded values are different when using the basic styles in Vaadin 25.