Open a wallet, open the proof editor dialog, close it and reopen a new proof editor dialog, check that the master key is different.
Then open a delegation editor dialog, click "generate key" and check that it opens an auxiliary key dialog with index 2 (0 and 1 were used for the two proofs). Increment the indexto 3, close the delegation dialog.
Then open the "Auxiliary keys" dialog via the "Wallet" menu, check that the index is now 4.
Close the wallet, reopen it, check that the index is now 5.
Set the index to 2147483647 (MAX value), close the wallet, reopen it and check that opening the auxiliary keys tool does not cause an overflow error (and the index is now stuck at 2147483647)