Make old version bots show up yellow on botlist

appengine/swarming/ui/res/imp/tasklist/task-filters.html

Index: appengine/swarming/ui/res/imp/tasklist/task-filters.html
diff --git a/appengine/swarming/ui/res/imp/tasklist/task-filters.html b/appengine/swarming/ui/res/imp/tasklist/task-filters.html
index 66b9e6c7c4346cfcf20c5984a8cafe33ff390435..e213f8418eeff2d448daf094fa4663df5f43f1b3 100644
--- a/appengine/swarming/ui/res/imp/tasklist/task-filters.html
+++ b/appengine/swarming/ui/res/imp/tasklist/task-filters.html
@@ -55,7 +55,7 @@
     </url-param>
     <url-param name="c"
       value="{{columns}}"
-      default_values='["name","state","created_ts","user"]'
+      default_values='["name","state","created_ts","user","bot"]'

[M-A Ruel, 2016/12/09 20:57:13]

"bot" is a confusing name for "bot_version" :/

[kjlubick, 2016/12/12 13:25:54]

"bot" means "Bot Assigned".  This change is just adding visibility into what bot
ran what tasks by default.

       multi>
     </url-param>
     <url-param name="q"