Revert "Remove redundant focus handler"

This reverts commit 739d952a81.
Bug: 48703

Change-Id: Ib66ed3c824f0bd5e68258eb5a39b8affc8b50e9f

resources/js/ext.uls.ime.js

@@ -154,7 +154,8 @@
 	mw.ime.setup = function () {
 
 		$( 'body' ).on( 'focus.ime', inputSelector, function () {
-			var $input = $( this );
+			var imeselector,
+				$input = $( this );
 
 			$input.ime( {
 				languages: mw.ime.getIMELanguageList(),
@@ -179,7 +180,13 @@
 
 					return $ulsTrigger;
 				}
-			} ).focus();
+			} );
+
+			// Some fields may be uninitialized
+			imeselector = $input.data( 'imeselector' );
+			if ( imeselector ) {
+				imeselector.selectLanguage( $.ime.preferences.getLanguage() );
+			}
 		} );
 
 	};