sort annotations so the historical annotations are drawn first, so up/down labels are mostly working properly

main.py

@@ -33,6 +33,8 @@ def index():
     bill_types = get_bill_types()
     depletion_date, savings_per_fortnight, final_savings = calculate_savings_depletion(finance_data, bill_data, bill_types)
     add_historical_annotations( finance_data )
+    # now sort this by X, then Y, to get the historical ones in the right order
+    finance_data['annotations'].sort(key=lambda item: (item['x'], item['y']))
     BUDGET=get_budget_data(finance_data)
 
     if depletion_date: