Fix navbar collapse

flaskbb/templates/layout.html

@@ -58,7 +58,7 @@
                 <div class="navbar navbar-default" role="navigation">
                     <!-- Brand and toggle get grouped for better mobile display -->
                     <div class="navbar-header">
-                      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse" aria-expanded="false">
+                      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#navbar-collapse" aria-expanded="false">
                         <span class="sr-only">Toggle navigation</span>
                         <span class="icon-bar"></span>
                         <span class="icon-bar"></span>
@@ -66,7 +66,7 @@
                       </button>
                     </div>
 
-                    <div class="collapse navbar-collapse">
+                    <div class="collapse navbar-collapse" id="navbar-collapse">
                         <!-- navbar left -->
                         <ul class="nav navbar-nav forum-nav">
                             {%- from theme("macros.html") import is_active, topnav with context -%}