Be consistent about 'TablePager' CSS class usage

* Do not use it when not actually using the TablePager
* Always use it when actually using the TablePager
* Use parent::getTableClass() rather than hardcoding it every time
* Place it before other classes to allow overriding

Change-Id: I042b65be64e2c2fa6c68a7bb972a7a2ea7f55b4e

includes/specials/SpecialAllMessages.php

@@ -336,8 +336,9 @@ class AllMessagesTablePager extends TablePager {
 	}
 
 	function getStartBody() {
+		$tableClass = $this->getTableClass();
 		return Xml::openElement( 'table', array(
-				'class' => 'mw-datatable TablePager',
+				'class' => "mw-datatable $tableClass",
 				'id' => 'mw-allmessagestable'
 			) ) .
 			"\n" .

includes/specials/SpecialBlockList.php

@@ -409,7 +409,7 @@ class BlockListPager extends TablePager {
 	}
 
 	public function getTableClass() {
-		return 'TablePager mw-blocklist';
+		return parent::getTableClass() . ' mw-blocklist';
 	}
 
 	function getIndexField() {

includes/specials/SpecialListfiles.php

@@ -557,15 +557,15 @@ class ImageListPager extends TablePager {
 	}
 
 	function getTableClass() {
-		return 'listfiles ' . parent::getTableClass();
+		return parent::getTableClass() . ' listfiles';
 	}
 
 	function getNavClass() {
-		return 'listfiles_nav ' . parent::getNavClass();
+		return parent::getNavClass() . ' listfiles_nav';
 	}
 
 	function getSortHeaderClass() {
-		return 'listfiles_sort ' . parent::getSortHeaderClass();
+		return parent::getSortHeaderClass() . ' listfiles_sort';
 	}
 
 	function getPagingQueries() {

includes/specials/SpecialProtectedpages.php

@@ -558,7 +558,7 @@ class ProtectedPagesPager extends TablePager {
 	}
 
 	public function getTableClass() {
-		return 'TablePager mw-protectedpages';
+		return parent::getTableClass() . ' mw-protectedpages';
 	}
 
 	function getIndexField() {

includes/specials/SpecialTrackingCategories.php

@@ -41,7 +41,7 @@ class SpecialTrackingCategories extends SpecialPage {
 		$this->outputHeader();
 		$this->getOutput()->allowClickjacking();
 		$this->getOutput()->addHTML(
-			Html::openElement( 'table', array( 'class' => 'mw-datatable TablePager',
+			Html::openElement( 'table', array( 'class' => 'mw-datatable',
 				'id' => 'mw-trackingcategories-table' ) ) . "\n" .
 			"<thead><tr>
 			<th>" .