Update navbar background color

frontend/src/app/components/master-page/master-page.component.html

@@ -1,7 +1,7 @@
 <ng-container *ngIf="{ val: network$ | async } as network">
 <header *ngIf="headerVisible" class="sticky-header">
 
-  <nav class="navbar navbar-expand-md navbar-dark bg-dark">
+  <nav class="navbar navbar-expand-md navbar-dark">
   <!-- Hamburger -->
   <ng-container *ngIf="servicesEnabled">
     <div *ngIf="user" class="profile_image_container" [class]="{'anon': !user.imageMd5}" (click)="hamburgerClick($event)">

frontend/src/app/components/master-page/master-page.component.scss

@@ -18,6 +18,7 @@ fa-icon {
   z-index: 100;
   min-height: 64px;
   width: 100%;
+  background-color: var(--bg);
 }
 
 li.nav-item {
@@ -179,7 +180,7 @@ nav {
   }
 }
 .navbar-dark .navbar-nav .nav-link {
-  color: #f1f1f1;
+  color: var(--icon);
 }
 
 .subdomain_logo {