Collection list custom title and image

[galenking]

PR Summary:

Why are these changes introduced?

1. The collection list section uses the title and image of the collection
2. This can be problematic when rebuilding a site using Dawn as existing collections may have images and titles that don’t fit the new design but making changes to the collection would impact the live theme
3. Often, merchants need to use different titles and/or images in collection lists than what is set at the collection level
4. Enables support for collection metafields for titles and/or images in collection lists

What approach did you take?

1. Low-code/minimal changes with graceful fallbacks

Visual impact on existing themes

1. There is no visual change on the frontend
2. Adds two block-level theme settings

Checklist

• Added PR summary for release notes
• Requested review from UX (Only for changes that are affecting the experience or perceivable visual details)
• Created a ticket for the help.shopify.com documentation team about updates to theme settings. (Internal-only task)
• Followed theme code principles
• Linted with Theme Check
• Tested on mobile
• Tested on multiple browsers
• Tested for accessibility

[translation-platform]

Localization quality issue found

The following issues may affect the quality of localized translations if they are not addressed:

• The value Custom Title for key sections.collage.blocks.collection.settings.title.label is very short. Short strings are more likely to be misunderstood by translators without context. Please provide additional context for the translators if possible.

Please look out for other instances of this issue in your PR and fix them as well if possible.

Questions about these messages? Hop in the #help-localization Slack channel.

[translation-platform]

Localization quality issue found

The following issues may affect the quality of localized translations if they are not addressed:

• The value Custom Image for key sections.collage.blocks.collection.settings.image.label is very short. Short strings are more likely to be misunderstood by translators without context. Please provide additional context for the translators if possible.

Please look out for other instances of this issue in your PR and fix them as well if possible.

Questions about these messages? Hop in the #help-localization Slack channel.

[translation-platform]

Localization quality issue found

The following issues may affect the quality of localized translations if they are not addressed:

• The value Custom Title for key sections.collection-list.blocks.featured_collection.settings.title.label is very short. Short strings are more likely to be misunderstood by translators without context. Please provide additional context for the translators if possible.

Please look out for other instances of this issue in your PR and fix them as well if possible.

Questions about these messages? Hop in the #help-localization Slack channel.

[galenking]

@tyleralsbury, as I mentioned in #3164, I messed up the original PR, and this now replaces it. My apologies.

[tyleralsbury]

Hey, no problem. Thanks Galen! 👍