Add human-readable output of time of the last gravity run.

Signed-off-by: DL6ER <dl6er@dl6er.de>

advanced/Scripts/piholeDebug.sh

@@ -1131,6 +1131,9 @@ analyze_gravity_list() {
     log_write "${COL_GREEN}${gravity_permissions}${COL_NC}"
 
     show_db_entries "Info table" "SELECT property,value FROM info" "20 40"
+    gravity_updated_raw="$(sqlite3 "${PIHOLE_GRAVITY_DB_FILE}" "SELECT value FROM info where property = 'updated'")"
+    gravity_updated="$(date -d @${gravity_updated_raw})"
+    log_write "   Last gravity run finished at: ${COL_CYAN}${gravity_updated}${COL_NC}"
     log_write ""
 
     OLD_IFS="$IFS"