Fixing Revert view with Reversion 2.0
Fixing Revert view with Reversion 2.0

revision_view and recover_view get extra context added by way of overriding render_revision_form(), 
but this method got renamed in Reversion 2.0, so we need to override _reversion_revisionform_view() too

Unfortunately saving this form hits other issues so this is WIP
mjl/feincms,mjl/feincms,mjl/feincms,feincms/feincms,feincms/feincms,feincms/feincms