* support zero amount transaction 
* unify Category in both Recurring Transaction and Transaction list with neested category by @wolfsolver 
* Compute correct budget with category by @wolfsolver
* set better hint for insert a note by @wolfsolver
* Correct drilldown from report (searchparameters) to trasnaction list by @wolfsolver
* Refine sync default interval to 10m
* Refine sync for some edge cases
