mdhelp: add column filter indication info

diff --git a/docs/markdown/webui_general.md b/docs/markdown/webui_general.md
index 9824a3e769f12e1be8091d80296c46d6cca8a46d..de8e095c5b83e983ca3d7b5771d7569d52e5c4d8 100644 (file)
--- a/docs/markdown/webui_general.md
+++ b/docs/markdown/webui_general.md
@@ -36,7 +36,8 @@ that need these values.
 
 * And the same drop-down menu also gives you access to a **filter** function
   if defined. The filter does simple pattern-matching on any string you
-  provide.
+  provide. A small blue flag or triangle will appear in the top-left 
+  corner to indicate that a filter is active.
   
 * **Re-arrange** the columns by simply dragging he header to a new spot.