ConnectionPanel: preserves whitespaces in explain panel [Closes #134]

Author: dg

src/Bridges/DatabaseTracy/templates/ConnectionPanel.panel.phtml

@@ -9,6 +9,7 @@ use Nette\Database\Helpers;
 <style class="tracy-debug">
 	#tracy-debug td.nette-DbConnectionPanel-sql { background: white !important }
 	#tracy-debug .nette-DbConnectionPanel-source { color: #BBB !important }
+	#tracy-debug .nette-DbConnectionPanel-explain td { white-space: pre }
 </style>
 
 <h1 title="<?= htmlSpecialChars($connection->getDsn(), ENT_QUOTES, 'UTF-8') ?>">Queries: <?php