Change z-index for menu

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/trunk@2446 b32b6428-25c9-4566-ad07-03861ab6144f

apps/dashboard/xaal/dashboard/static/css/site.css

@@ -62,6 +62,7 @@ ul.menu {
     top: 0; /* Position the navbar at the top of the page */
     width: 100%; /* Full width */
     /* box-shadow: 0px 4px 4px #aaaaaa; */
+    z-index: 1;
 }
 
 ul.menu li {
@@ -93,7 +94,7 @@ ul.menu li a:hover {
     height: 100%;
     width: 0;
     position: fixed;
-    z-index: 1;
+    z-index: 100;
     top: 0;
     left: 0;
     background-color: var(--menu_bg);