compact tooltip registration, no longer re-activate tooltips, now add only once
compact tooltip registration, no longer re-activate tooltips, now add only once

When initially implement this tooltips feature, I thought it is
necessary but it seems to be my misunderstanding.
When re-activate tooltips after disposing previous tooltips, short cut
for command is not correctly displayed, not investigated since adding
once solved this problem without noticeable caveat.

t9md/atom-narrow