Fix branch selector UI, and un-nest a function
Fix branch selector UI, and un-nest a function

The branch selector behaves differently form others, see
setup_benchmark_params

pv/asv,qwhelan/asv,mdboom/asv,mdboom/asv,airspeed-velocity/asv,spacetelescope/asv,edisongustavo/asv,spacetelescope/asv,mdboom/asv,airspeed-velocity/asv,giltis/asv,qwhelan/asv,spacetelescope/asv,edisongustavo/asv,pv/asv,mdboom/asv,spacetelescope/asv,qwhelan/asv,pv/asv,edisongustavo/asv,airspeed-velocity/asv,qwhelan/asv,airspeed-velocity/asv,giltis/asv,giltis/asv,pv/asv