If I have a complex account structure like this

main
- 2000
  - incomes
  - expenses
- 2001
  - incomes
  - expenses
- 2002
  - incomes
  - expenses
- 2003
  - incomes
  - expenses

when I open the 2000.incomes register I have no way to see if it is 2000.incomes or 2001.incomes or 2002.incomes or 2003.incomes, because the tab title only says incomes.

Probably putting 2000.income would be bad, because the structure could have many levels, and the tab would become too wide.

But we have to look for something that gives the parent accounts information.

If we don't put all the parents accounts in the tab name, at least a tooltip to show when hovered with the mouse is due.