Mark accounts that are overspend

That means that accounts with spending in the current greater than the
average spending

financer-web-client/src/main/resources/static/changelog.txt

@@ -1,3 +1,7 @@
+v23 -> v24:
+- Mark accounts that are overspend, meaning their spending in the current period is greater than the average spending of
+  that account
+
 v22 -> v23:
 - Make table headers sticky if the table scrolls
 

financer-web-client/src/main/resources/static/css/main.css

@@ -28,7 +28,11 @@
 }
 
 tr:hover {
-  background-color: lightgrey;
+    background-color: lightgrey;
+}
+
+.overspend {
+    color: #ff6666;
 }
 
 @media only screen and (max-width: 450px) {