Switch to side-by-side view

--- a/webui.py
+++ b/webui.py
@@ -84,6 +84,8 @@
             return value
 
 def timestr(secs, fmt):
+    if secs == '' or secs is None:
+        secs = '0'
     t = time.gmtime(int(secs))
     return time.strftime(fmt, t)