Improved background and z-index of multiselect

assets/css/modules/multiselect.css

@@ -6,7 +6,8 @@
 
 #multiselect {
 	position: absolute;
-	background-color: RGBA(0, 94, 204, .4);
+	background-color: RGBA(0, 94, 204, .3);
 	border: 1px solid RGBA(0, 94, 204, 1);
 	border-radius: 3px;
+	z-index: 3;
 }