UX: Minor responsive improvement

public/sass/components/_navbar.scss

@@ -63,6 +63,14 @@
       display: inline-block;
     }
   }
+
+  .navbar-page-btn__folder-icon {
+    display: none;
+
+    @include media-breakpoint-up(md) {
+      display: inline-block;
+    }
+  }
 }
 
 .navbar-page-btn__folder {

public/sass/components/_sidemenu.scss

 $mobile-menu-breakpoint: md;
 
 .sidemenu {
-  background: $side-menu-bg;
   position: fixed;
   display: flex;
   flex-flow: column;
@@ -22,6 +21,7 @@ $mobile-menu-breakpoint: md;
   }
 
   @include media-breakpoint-up($mobile-menu-breakpoint) {
+    background: $side-menu-bg;
     height: auto;
     box-shadow: $side-menu-shadow;
     position: relative;