Fix close slider when a feed is selected

See https://github.com/marienfressinaud/FreshRSS/issues/646

app/views/subscription/index.phtml

@@ -134,8 +134,9 @@
 	<?php } ?>
 </div>
 
-<a id="close-slider"></a>
-<div id="slider"<?php echo isset($this->feed) ? ' class="active"' : ''; ?>>
+<?php $class = isset($this->feed) ? ' class="active"' : ''; ?>
+<a href="#" id="close-slider"<?php echo $class; ?>></a>
+<div id="slider"<?php echo $class; ?>>
 <?php
 	if (isset($this->feed)) {
 		$this->renderHelper('feed/update');

p/scripts/main.js

@@ -1272,6 +1272,7 @@ function init_slider_observers() {
 	closer.on('click', function() {
 		closer.removeClass('active');
 		slider.removeClass('active');
+		return false;
 	});
 }