[RW-4696][risk=no] Sticky the dataset builder footer (#3692)
[RW-4696][risk=no] Sticky the dataset builder footer (#3692)


all-of-us/workbench,all-of-us/workbench,all-of-us/workbench,all-of-us/workbench,all-of-us/workbench,all-of-us/workbench,all-of-us/workbench,all-of-us/workbench,all-of-us/workbench