Fixes the click on the install by URL tab. The necessary JavaScript w… (#209)

* Fixes the click on the install by URL tab. The necessary JavaScript was not loaded, to nothing happened and the input field for the URL was not reachable.

* Codestyle adjustments.

Author: svenbluege

src/JoomlaBrowser.php

@@ -496,6 +496,9 @@ public function installExtensionFromUrl($url, $type = 'Extension')
 	{
 		$this->amOnPage('/administrator/index.php?option=com_installer');
 		$this->waitForText('Extensions: Install', '30', array('css' => 'H1'));
+
+		// Let the tabsset come to life
+		$this->wait(1);
 		$this->click(array('link' => 'Install from URL'));
 		$this->debug('I enter the url');
 		$this->fillField(array('id' => 'install_url'), $url);