• 부채 관리: 사용자 인터페이스 개선

https://github.com/mtotschnig/MyExpenses/projects/87#column-19319144
https://github.com/mtotschnig/MyExpenses/projects/88#column-19342866
https://github.com/mtotschnig/MyExpenses/projects/89#column-19352018
