- create new book
- add entry to book
- calculate start and end sum of book
- sort book entries by date
- print book month
- import / export book
- delete book
- selection of month
- suggest description inputs
- support save by enter when editing existing entry
- add invoice pdf / image
- capture invoice image from camera
- import & export invoice files
- add tags to book entries
- add new year
- selection of year
- fix flickering when selecting entry when already editing