Fix issue in sequence re-indexing (Pulse are not the only one which don't re-index), release the constraints on the root of an item to allow TemplateSequence and fix issue when rebuilding RootSequence (context not set).
Update template handling as a dependence. Building test for the TemplateSequence are passing.
Fix issue in PulsesManagerPlugin : import errors where not correctly reported. Fix some views (just import).