[VkBridge] Better title generation:

1. Use first parargraph only
2. Remove tags
3. Allow to use comma and colon in title

bridges/VkBridge.php

@@ -448,7 +448,9 @@ private function getPhoto($a)
 
     private function getTitle($content)
     {
-        preg_match('/^["\w\ \p{L}\(\)\?#«»-]+/mu', htmlspecialchars_decode($content), $result);
+        $content = explode('<br>', $content)[0];
+        $content = strip_tags($content);
+        preg_match('/^[:,"\w\ \p{L}\(\)\?#«»-]+/mu', htmlspecialchars_decode($content), $result);
         if (count($result) == 0) {
             return 'untitled';
         }