In the case of Base.asContext, initializing workflow was totally useless
because 'workflow_history' was overridden by the original one.

When sorting on int_index for example, the returned movement list
was in reversed order of the expected one.

This fixes a regression introduced in 77d94dd5
("Speed up RuleTool.searchRuleList by quickly filtering out rules"),
causing TestRule.test_09_expandTwoRules to fail.

UNG code contains overrides of default ERP5 UI and KM UI which breaks it so add theme to its default skin selection (same way as KM).

Otherwise other directories may be considered as part of erp5.util
(such as product).