displaysettings,inputsettings: Rename two classes for consistency

I suspect these may have been accidentally mixed up or miscompleted
from a nearly data-attribute or interface message, since all other
classes start with `.uls-` in this repository.

* "uls-input-settings-imes" is not used referenced anywhere else.

* "uls-sub-panel" is referenced in one skinStyles override, updated with
  https://github.com/StarCitizenTools/mediawiki-skins-Citizen/pull/434.

Change-Id: Ia0b23d795f7807ef9227f66d0890a25524cd5a9f

resources/js/ext.uls.inputsettings.js

@@ -45,7 +45,7 @@
 		'<div class="twelve columns">' +
 		'<div class="uls-input-settings-inputmethods-list">' +
 		// "Input settings for language xyz" title
-		'<h4 class="ext-uls-input-settings-imes-title"></h4>' +
+		'<h4 class="uls-input-settings-imes-title"></h4>' +
 		'</div>' +
 		'</div>' +
 		'</div>' +
@@ -118,7 +118,7 @@
 
 			imes = $.ime.languages[ language ];
 
-			$imeListTitle = this.$template.find( '.ext-uls-input-settings-imes-title' );
+			$imeListTitle = this.$template.find( '.uls-input-settings-imes-title' );
 			$imeListContainer = this.$template.find( '.uls-input-settings-inputmethods-list' );
 
 			$imeListContainer.empty();