style: add box shadow by default in header

Author: JamsMendez

themes/basic/assets/css/_header.scss

@@ -6,7 +6,8 @@
   justify-content: center;
   align-items: center;
   height: $header-height;
-  border-bottom: 1px solid #ddd;
+  border-bottom: 1px solid #ccc;
+  box-shadow: 1px 1px 3px #ccc;
 
   .header-left { text-align: left }
   .header-center {
@@ -18,11 +19,6 @@
   .button-search {
     text-decoration: none;
   }
-
-  &:hover {
-    border-bottom: 1px solid #ccc;
-    box-shadow: 1px 1px 3px #ccc;
-  }
 }
 
 .menu-button {