Reopen the recently closed buffer in a new tab page.
:ReopenBuffer [{index}]{index} is an zero-based integer which indicates the position in a List where
the closed buffers are stored. The default is 0 and refers to the most
recently closed buffer. At most 100 buffers are stored.
A negative index is counted from the end. Index -1 refers to the most early
closed buffer in the List.
Doesn't change the recently closed buffer if the closed buffer is still visible in another window,