Allow disabling of IME by a jQuery selector

Add the variable $wgULSNoImeSelectors to allow custom
disabling of IME in specific elements.

Add captcha input field id to the exclusion list.

Bug: 41675
Change-Id: Ib03a20c50a4f473e6a58638b85da16659268eb09

UniversalLanguageSelector.php

@@ -123,6 +123,13 @@ $wgULSPosition = 'personal';
  */
 $wgULSEventLogging = false;
 
+/**
+ * Array of jQuery selectors of elements on which IME must not be enabled.
+ *
+ * @since 2013.07
+ */
+$wgULSNoImeSelectors = array( '#wpCaptchaWord' );
+
 $dir = __DIR__;
 
 // Internationalization