fix theme color

src/client/styles/scss/_page_growi.scss

@@ -21,8 +21,6 @@
       }
     }
     .grw-compact-subnavbar {
-      background-color: rgba(250, 250, 250, 0.9);
-      box-shadow: 0 0 2px #999;
       h2 {
         font-size: 20px;
         line-height: 1.1em;

src/client/styles/scss/theme/_apply-colors.scss

@@ -312,3 +312,11 @@ body.on-edit {
     }
   }
 }
+
+/*
+ * GROWI subnavigation
+ */
+.grw-compact-subnavbar {
+  background-color: rgba(250, 250, 250, 0.9);
+  box-shadow: 0 0 2px #999;
+}