This allows me to jump to a workspace that is already displayed on
some buffer.
This also interfaces correctly with my back-and-forth jump
functionality, setting the variables to allow quick jumping back to
the previous buffer via the numerical index of the destination or - of
course - via s-b.
Change-Id: I25db7535089bcb17b3d61d53030b9154cfeac023
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5323
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: tazjin <tazjin@tvl.su>