Update styles for notification flash

web/static/css/style.css

@@ -218,17 +218,16 @@ div.inset-content {
     margin-right: 10%;
 }
 
-div.flash-message {
+div.flash-container {
     position: fixed;
+    width: 100%;
+    bottom: 0;
+}
+
+div.flash-message {
     width: calc(100% - 32px);
     margin: 16px !important;
     z-index: 99;
-    bottom: 0;
-    display: none;
-}
-
-div.flash-message.is-active {
-    display: block;
 }
 
 body {