fixing download overlay

Author: maybeec

asciidoctor-stylesheet/sass/devonfw.scss

@@ -237,6 +237,8 @@ tr:nth-child(even) {
 	line-height: 1.5;
 	border-radius: .25rem;
 	margin-top: 0 !important;
+	position: relative;
+	z-index: 1000;
 	&:hover {
 		visibility: visible;
 	}
@@ -300,4 +302,4 @@ tr:nth-child(even) {
       color: lightgray;
     }
   }
-}
+}