general: Use the "labelled-by" property more often & add a11y labels

Automeris naranja requested to merge (removed):a11y-labelled-by into main
  • Use the "labelled-by" property more often: in several places there are a11y labels that duplicates a widget title. Using the "labelled-by" property means less work for translators.
  • Add some a11y labels

Minor changes

  • wacom: Rename "Test Your Settings" button to "Test Settings"
Edited by Automeris naranja

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