Regarding revised toolbar design:
Putting the user coloured activity icon
in as the first icon is also a nice design win regarding
identifying the activity you're looking at (and whose it is).
I'm not your typical user - I usually have more than 100 Activities
installed. You may remember what 100 icons mean - but I sure don't.
[Whereas text is self-explanatory.]
And if you've ever looked at Neighborhood View while connected to
jabber.sugarlabs.org - it is hard to keep track of "whose" each icon
is -- color is well suited for those with photographic memories.
mikus