Use label-primary for number of enabled list icon on sidebar (#3563)

Author: DL6ER

scripts/lua/sidebar.lp

@@ -77,7 +77,7 @@
                         <i class="fa fa-fw menu-icon fa-shield-alt"></i>
                         <span>Lists
                             <span class="pull-right-container">
-                                <span class="label bg-blue pull-right" id="num_lists" title="Number of subscribed and enabled lists"></span>
+                                <span class="label label-primary pull-right" id="num_lists" title="Number of subscribed and enabled lists"></span>
                                 <span class="label bg-yellow pull-right" id="num_gravity" title="Total number of domains subscribed by your Pi-hole"></span>
                             </span>
                         </span>