numerous updates

static/debug_toolbar/css/toolbar.css

@@ -607,6 +607,18 @@
 #djDebug .djdt-highlighted {
     background-color: lightgrey;
 }
+@keyframes djdt-flash-new {
+    from {
+        background-color: green;
+    }
+    to {
+        background-color: inherit;
+    }
+}
+#djDebug .flash-new {
+    animation: djdt-flash-new 1s;
+}
+
 .djdt-hidden {
     display: none;
 }