Need to call into the superclass in order not to lose functionality. Was
missing in the wizard, hence the many missing occurrences.

Reviewed-by: Friedemann Kleint

Task:
RevBy:
AutoTest:
Details: Moved code to create a local branch from model to dialog which is slightly better since all the modifying app code is there.

Task: 205821
Details: Split up the branch model into remote branch base class and extended local branch class with <New Branch> row.