Revert "Test deferred style with converting to a format"

This reverts commit cbfa8d56.
-> pushed by mistake

Revert "Set cloudoo on preferences in ERP5TypeTestCase"

This reverts commit 28824962.
-> pushed by mistake

Revert "Listbox from Folder_viewWorkflowActionDialog has hidden columns"

This reverts commit 802d3f53.
-> a test is failing

This is a followup to commit 8995b645
("always start transactions with begin() and make tic() commit automatically"):
there is now no need to use self.stepTic() instead of self.tic()