Update jquery.uls and adapt styling

jquery.uls.compact module is kept for now as some other
extensions depend on it. But it does not do anything
anymore.

There are some styles which should be in jquery.uls
upstream, but given the current state that is easiest
done in a follow-up later.

The main change is that language selection is now
compact by default: no heading etc.

Includes style changes for the dialogs, and especially
for the new position of the callout caret.

Bug: T85519
Change-Id: Iade8005439b4f58ab241752f69a5365d8bb88d2c

lib/jquery.uls/i18n/en.json

@@ -5,7 +5,6 @@
 		"locale": "en",
 		"message-documentation": "qqq"
 	},
-	"uls-select-language": "Select language",
 	"uls-region-WW": "Worldwide",
 	"uls-region-SP": "Special",
 	"uls-region-AM": "America",

lib/jquery.uls/i18n/qqq.json

@@ -6,7 +6,6 @@
 			"Shirayuki"
 		]
 	},
-	"uls-select-language": "Language Selector Title.\n{{Identical|Select language}}",
 	"uls-region-WW": "Label for worldwide languages. They are languages spoken in multiple countries. Eg: English, French, Spanish etc. This label is used in the map region of ULS and as the title of section showing worldwide languages. Translation should not be descriptive.",
 	"uls-region-SP": "Label for the special languages section. This section may include special custom languages that can be added in run time. It's shown after the Worldwide section.\n\nThe special language is everything that isn't a real language. Like code qqq or qqx.\n{{Identical|Special}}",
 	"uls-region-AM": "Label for America",