Update id names

Author: Jelle Kok

src/JoomlaBrowser.php

@@ -328,7 +328,7 @@ public function installExtensionFromFolder($path, $type = 'Extension')
 		$I->click(['link' => 'Install from Folder']);
 		$this->debug('I enter the Path');
 		$I->fillField(['id' => 'install_directory'], $path);
-		$I->click(['xpath' => "//div[@id='folder']/fieldset/div[2]/input"]); // Install button
+		$I->click(['id' => 'installbutton_directory']); // Install button
 		$I->waitForText('was successful','60', ['id' => 'system-message-container']);
 		$this->debug("$type successfully installed from $path");
 	}
@@ -348,8 +348,8 @@ public function installExtensionFromUrl($url, $type = 'Extension')
         $I->waitForText('Extensions: Install','30', ['css' => 'H1']);
         $I->click(['link' => 'Install from URL']);
         $this->debug('I enter the url');
-        $I->fillField(['id' => 'install_url'], $url);
-        $I->click(['xpath' => "//div[@id='url']/fieldset/div[2]/input"]); // Install button
+	    $I->fillField(['id' => 'install_url'], $url);
+	    $I->click(['id' => 'installbutton_url']); // Install button
         $I->waitForText('was successful','30', ['id' => 'system-message-container']);
         if ($type == 'Extension')
         {