Bug Description

Following #1101, the icon and banner for some feature plugins no longer match the names. Specifically, "WebP Uploads" was renamed "Modern Image Formats" and "Dominant Color Images" was renamed "Image Placeholders".

For Discussion

We could create new assets using the previous practice of using the first two letters of the plugin name, but this also could be a good time to rethink the design strategy for these assets. To consider:

• Should we use icons that are not "alpha" based at all, so that changing a feature name doesn't require new assets?
• Should we keep using the current "alpha" strategy, but make them based on feature initials, rather than first two letters (e.g., Auto-Sizes becomes "AS" instead of "AU"?
• Should we use a generic icon that can be applied to all features so we don't have to create assets each time we want to create a new feature plugin?

Steps to reproduce

Visit the WP.org plugin pages:

• https://wordpress.org/plugins/dominant-color-images/
• https://wordpress.org/plugins/webp-uploads/

Screenshots