Problem: Currently, to name a family pedigree you have to first build it. Then go to the homepage and find the unnamed pedigree (which is tricky when there are multiple). Edit the unnamed pedigree and give it an identifier
Solution: add an input in the family selector dialog which pops up when initiating "Draw pedigree" on the patient record. It should be enabled when the "create" option is selected and the user should be invited to enter an optional family name/id, which will be used as the family's external id. We could pre-fill some default value like proband's (i.e. current patient's) external id or last name when available.