Admin: add inline Version admin to Revision

[mkaluza]

This allows to browse all changed objects within a revision much more
comfortably

[codecov]

Codecov Report

Merging #105 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #105   +/-   ##
=======================================
  Coverage   78.52%   78.52%           
=======================================
  Files           4        4           
  Lines         433      433           
  Branches      104      104           
=======================================
  Hits          340      340           
  Misses         70       70           
  Partials       23       23

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[coveralls]

Coverage decreased (-0.3%) to 84.874% when pulling f392bfe on mkaluza:inline_version_in_revision into 3179a76 on jedie:master.

[jedie]

Can you rebase you changes, please?