style: adapt dark-theme colors

src/app/xtream/navigation-bar/navigation-bar.component.scss

@@ -1,16 +1,3 @@
-::ng-deep {
-    .dark-theme {
-        #navigation,
-        #sub-panel {
-            background: black;
-        }
-
-        #sub-panel {
-            border-bottom: 1px solid #333;
-        }
-    }
-}
-
 :host {
     position: sticky;
     top: 0;
@@ -64,3 +51,15 @@
         }
     }
 }
+
+::ng-deep {
+    .dark-theme {
+        #navigation, #sub-panel {
+            background: black;
+        }
+
+        #sub-panel {
+            border-bottom: 1px solid #333;
+        }
+    }
+}