improve how we find monthly bill in a month, dont use exact date just use yy-mm, also fix BUG where kayo used estimate in jan to project for the next 5years, rather than real bill in feb (all in the future) to estimate

BUGS

@@ -1,4 +1,3 @@
-* kayo is using wrong bill to extend - there is a future bill in the monthly and that is not being used...
 * added an electricity bill by accident for 2018, that kills lots :(
     - something to do with missing year of data in quarterly bills - still an issue
 

bills.py

@@ -110,6 +110,10 @@ def find_previous_bill( bill_type, bill_info, bill_date ):
             # okay, we have the previous billing year, and we wanted one for a year in the future,
             # just return the last one in this year as its the most recent
             if wanted_year > yr:
+                # small chance of future bills having estimates and reals (kayo did this)
+                for tmp in bill_info[bill_type]['year'][yr]:
+                    if tmp['estimated'] == 0:
+                        return tmp
                 return bill_info[bill_type]['year'][yr][0]
             else:
                 # lets go through the newest to oldest of these bills
@@ -219,12 +223,13 @@ def add_missing_monthly_bills_in_yr( bill_type, bill_info, yr ):
     for i in range( start_m+1, 13 ):
         bill_found=False
         new_date = f'{yr}-{i:02d}-{dd}'
+        new_date_yymm=f'{yr}-{i:02d}'
         if yr in bill_info[bill_type]['year']:
             for b in bill_info[bill_type]['year'][yr]:
                 # this bill exists, skip adding it (this occurs when called to
                 # add bills as there are < 12 bills in first_year, BUT, we
                 # don't fill before first_bill so the < 12 ALWAYS triggers
-                if str(b['bill_date']) == new_date:
+                if new_date_yymm in str(b['bill_date']):
                     bill_found=True
                     break
         if not bill_found: