Auto-Select Language Icons
Language icons are not intuitively named, so selecting one manually might be a challenge. Create AJAX code that auto-populates the icon field based on the language-code entry (ISO-639-X => ccTLD mapping), includes a preview, and a image-based directory listing while modifying the field.
Since this requires ISO-to-CC mappings (which is not 1:1 and there are a LOT of ISO codes), this has been marked as a major feature even though it only affects the UX of one admin field.