handle simple future bills and their growth all now done

TODO

@@ -2,10 +2,8 @@ UI:
 
 For bills:
     Future bills:
-    * first pass for future bills done, but frequency is hard-coded and no growth - should at least add growth (easy enough)
-
-    * longer-term: make the moment we quit / own car trigger new bill creation, and remove hard-coded logic on costs - just use bill_data created
-        - this will then cover handling different bill_types or growth models
+        * longer-term: make the moment we quit / own car trigger new bill creation, and remove hard-coded logic on costs - just use bill_data created
+            - this will then cover handling different bill_types or growth models
 
     * might need to be able to mark a specific bill as an outlier - so we ignore the data somehow (think Gas is messing with my bills)
         - and even electricity, water, etc. for when we were away in Europe but mostly gas/elec