Fix some issues pointed out by IDE.

* Update .gitignore to ignore .idea.
* Removed unused local variables.
* use local context and Message class instead of deprecated wfMsg* methods.
* Remove redundant px in CSS where possible.
* Combine CSS statements where possible.
* Replace b by strong.

Change-Id: I9d5ed7b7ce585a1c101044254bcbdfc33d42afc1

UniversalLanguageSelector.hooks.php

@@ -53,7 +53,6 @@ class UniversalLanguageSelectorHooks {
 	 */
 	static function addTrigger( array &$personal_urls, &$title ) {
 		global $wgLang;
-		$tabindex = 2;
 		$personal_urls = array( 'uls'=> array(
 					'text' =>  $wgLang->getLanguageName( $wgLang->getCode() ),
 					'href' => '#',
@@ -119,7 +118,7 @@ class UniversalLanguageSelectorHooks {
 			</div>
 			<div class='row'>
 				<div class='four columns'>
-					<h1>" . wfMsgHtml( 'uls-select-content-language' ) . "</h1>
+					<h1>" . $skin->msg( 'uls-select-content-language' )->escaped() . "</h1>
 				</div>
 				<div class='three columns' id='settings-block'></div>
 				<div class='five columns' id='map-block'>