Define $wgProfiler via LocalSettings.php instead.
* The mw.loader.addSource() is now considered a private method, and no longer
supports the `id, url` signature. Use the `Object` parameter instead.
+* The backwards-compatibility code in HTMLForm to add a drop-down control to an
+ option that is not set to be a drop-down if the "mw-chosen" class is present,
+ is now removed.
* Several collations were removed. They were workarounds for bugs in the ICU
library and they are no longer needed (as of ICU 57.1):
* 'uppercase-se' (NorthernSamiUppercaseCollation) - use 'uca-se' instead