Followup 861d097: actually exclude reference tool in reference dialog toolbar

It was excluded, but also promoted, and the toolbar resolves this ambiguity
in favor of promotion.

Bug: 62575
Change-Id: I2f1eadb27cbd16e3258aee0311c7b35f6311ea5a
Merge "Followup 861d097: actually exclude reference tool in reference dialog toolbar"