I think you can do this now with a script.
This script will “focus beam down”. You can modify it to “focus beam up” by replacing next sibling row
with prev sibling row
.
tell front document of application "Bike"
if exists focused row then
set each to next sibling row of focused row
repeat while each ≠ missing value
if name of each ≠ "" then
set focused row to each
return
else
set each to next sibling row of each
end if
end repeat
end if
beep
end tell