`shift+r` should only be triggered on `keyup`
`shift+r` should only be triggered on `keyup`

to prevent multiple invocations when users hold the `shift+r`,
also prevent extra invocations on `r` as when you,
loose the shift first then `r:keyup` will trigger the toggle on review

Change-Id: I3c7559863269477e1395a2831c76e47a209c31b1
(cherry picked from commit db13f975a5792c6f1d6587359ccdaf6fd4969ac6)

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