0.12.6beta1: fixed raising `UndefinedError` if an internal error occurs and disabling report buttons while accessing by non administrator (closes #11733)


git-svn-id: http://trac.edgewall.org/intertrac/log:/branches/0.12-stable@13101 af82e41b-90c4-0310-8c96-b1721e28e2e2