When customising a report the Category tab provides 4 selection buttons:

All
Income
Expense
None

The "All" and "None" buttons work as expected however the "Income" and "Expense" buttons do not.

The "Income" button only selects top-level income categories and none of the income sub-accounts.

Clicking the "Expense" button does select all the expense categories and sub-accounts HOWEVER it also selects all of the income sub-accounts (but not the top-level income categories).

Reproducible: Always

Steps to Reproduce:
1. Open a report e.g. Income and Expenses by Year
2. Click "Configure" and select the "Category" tab
3. Click the "Income" button
4. Click the "Expense" button
Actual Results:  
As described in the Details section above

Expected Results:  
Clicking the "Income" button should select all Income categories and Income sub-accounts, it should also de-select all Expense categories and Expense sub-accounts.

Clicking the "Expense" button should perform the reverse of clicking the "Income" button.