This changeset updates the old list tables for themes and theme installation to remove `title` attributes or replace them with a more acessible implementation:
- Removes `title` attributes from `span` elements
- Replaces `title` with `aria-label` for links whose visible text starts with the same word, consistently with links on the "Add Plugins" screen
- Reuses the `$preview_title` variable to keep ARIA labels consistent for both Preview links
Follow-up to [22439], [27548], [31513], [32991], [50804], [53414].
Props karlgroves, sabernhardt, audrasjb, alh0319.
Fixes#62834.
See #24766.
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