Magit now uses Transient instead of magit-popup, and we must adapt. Also had to
replace the recently removed magit-diff-buffer-file-popup with
magit-diff-buffer-file (similar but doesn't offer a popup before displaying the
diff).
Note some upstream packages haven't adapted to this change, but when they do we
might need similar fixes:
- magithub
- magit-gitflow
- magit-svn
By analogy with the "zz", "zb", "zt" vim / evil bindings, this adds an
additional key binding "z" for `recenter-top-bottom` to the following
transient states which navigate around the buffer in large jumps:
- auto-symbol-highlight
- error
- buffer
- vcs
- org-babel
This allows for repositioning of the buffer for visibility without having to
exit the transient state.
Minor updates are also made to documentation of other transient states.
