Update css selector test

[simurai]

Description

This is a follow-up to #1574 and adds some more previews to:

• Label
• Blankslate

Label	Blankslate

Also added some selectors to IGNORED_SELECTORS that are mostly old/deprecated classes that we still need to migrate on dotcom before we can remove them.

Integration

Does this change require any updates to code in production?

No

Merge checklist

• Added/updated tests
• Added/updated documentation
• Added/updated previews

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[simurai]

I haven't taken a closer look at the .Button and .ActionList selectors. Should we ignore them for now? At least until we move the remaining component styles from PCSS.

I tried it locally but for some reason selectors with attributes don't seem to work. E.g. adding .ActionListItem[hidden] + .ActionList-sectionDivider to IGNORED_SELECTORS still made it show up as a failure? 🤔

[mxriverlynn]

add the [ ignore and this looks good to me 👍🏻

[simurai]

@mxriverlynn add the [ ignore and this looks good to me 👍🏻

Thanks! 🙇 Yes, that seems to ignore all the attributes in selectors.

Today I might look into adding more previews for flash and dropdown and ignore the rest (ActionList/Button).

Update: PR #1606