LDEV-1432 Optionals were being added to a separate complex activity layer and transitions were not being displayed due to a blocking condition statement. Moved optional placement to normal activity layer resolves this bug also.
LDEV-1109 Activityless branching improvements - can draw activityless branch and fixed a few validation issues. Prevent saving sequence activity that is empty and a default for a branching activity (view).
LDEV-1278 Learner Index bar implemented and working though drawing lots of learners still has problems rendering movieclips. Need to look at optimisation for this.
LDEV-1109 Fixes some Branching in Branching issues such as bin placement, position and clip attachment. Also improves redrawing of branch connectors when moving start/end connector hubs.
