fix: sidebar button should be hidden when there are no sidebars in mobile side (#1159)

Author: matthieumota

Diff for: lib/default-theme/styles/theme.styl

@@ -172,12 +172,17 @@ th, td
       display: block
   &.no-navbar
     .content:not(.custom) > h1, h2, h3, h4, h5, h6
-        margin-top 1.5rem
-        padding-top 0
+      margin-top 1.5rem
+      padding-top 0
     .sidebar
       top 0
     .custom-layout
       padding-top 0
+  &.no-sidebar
+    .sidebar-button
+      display: none
+    .navbar
+      padding-left 1.5rem
 
 
 @media (min-width: ($MQMobile + 1px))