added info
unused
typo
update doc
two mesures that prevent crash when transaction_cursor and grouping_cursor get out of sync: we do not call notifydataset changed to early, and we check for the case we have a transaction that was not found in a group (mGroupingCursor will be afterLast)
debug should be false
notify also when groping is none, otherwise UI is not updated when user switches from grouped to ungrouped
allow state loss prevents crash when app is put in background while task is executed
RELEASE