VisualEditor: Make language name for a code block case-insensitive
When editing a code block in VisualEditor where the language name is set in upper case, it appears in VE and can be edited, but after opening the dialog, the language name is considered invalid and you can't apply changes in the dialog until you "fix" it. Instead, language names should be case-insensitive.
You are expected to provide a patch in Wikimedia Gerrit. See https://www.mediawiki.org/wiki/Gerrit/Tutorial for how to set up Git and Gerrit.