Preparing PHP and javascript files for the new themes

- change HTML header code
- add new class to Pi-hole logo
- add new classes to auditlog buttons
- add new classes to query log and long-term query log buttons

Signed-off-by: RD WebDesign <github@rdwebdesign.com.br>

scripts/pi-hole/php/header_authenticated.php

@@ -206,7 +206,7 @@ if ($auth) {
                         <ul class="dropdown-menu">
                             <!-- User image -->
                             <li class="user-header">
-                                <img src="img/logo.svg" alt="Pi-hole Logo" style="border: 0" width="90" height="90">
+                                <img class="logo-img" src="img/logo.svg" alt="Pi-hole Logo" style="border: 0" width="90" height="90">
                                 <p>
                                     Open Source Ad Blocker
                                 </p>