I think it'd be useful to split the Hyperlink, BlockQuote, CodeSample, and Image actions/icons into 2 groups that are organized closer to their functionality as the other buttons are arranged.
B
I
| Link
Image
| CodeSample
BlockQuote
| OrderedList
.....
I often find myself hunting for the code sample button since the context of its position is confusing being positioned between Link/Image along with a similar block quote also being wedged in there.