[GOM] Warn when the roll is running behind

Tools/GardeningServer/styles/common.css

Index: Tools/GardeningServer/styles/common.css
diff --git a/Tools/GardeningServer/styles/common.css b/Tools/GardeningServer/styles/common.css
index 7d00e61d72c37ee5f9bb9b376ddac920f1979e53..c3f48cae8d7c9df4d376047fbf28a50744a15381 100644
--- a/Tools/GardeningServer/styles/common.css
+++ b/Tools/GardeningServer/styles/common.css
@@ -103,3 +103,19 @@ button.default:hover {
 .clear {
     clear: both;
 }
+
+/***  Visual escalation ***/
+
+.warning {
+    color: white;
+    background-color: #ffc343;
+    font-weight: bold;
+    font-size: 2em;
+}
+
+.critical {
+    color: white;
+    background-color: #e98080;
+    font-weight: bold;
+    font-size: 3em;
+}