Do not show inactive issue priorities where not necessary (#8573).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@6070 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/fixtures/enumerations.yml

@@ -81,3 +81,9 @@ enumerations_014:
   type: TimeEntryActivity
   position: 4
   active: false
+enumerations_015:
+  name: Inactive Priority
+  id: 15
+  type: IssuePriority
+  position: 6
+  active: false