I'm reprioritizing this issue as wish

Ok, I reverted back to the old style except it only takes a single click. Is 
this ok?

One drawback of opening a true persistent editor in a cell is that when it 
starts getting to higher numbers ( > 25 ) you start to notice it taxing your 
system quite a bit. I think if we expect people to open quite large data sets 
then we really should not have the actual widget open there at all times.

I have reverted the changes and if I come across a solution that can accommodate 
large data sets then I will implement.

Hmm...  Having to click to focus and then click again to select really "feels"
like a bug to me.  If it's not possible to single click to change the outcome
value, I think that reverting to the previous behavior (double-click to change
state) would be better.

This is completed in changeset 7500c5bcd7b2