Pass the correct parent to call PaulistaInvoiceDialog.

Change-Id: Ibae979ce4c6112fde58538d4f0acc318165e4ae9
Remove an already done TODO

Just removing so we can grep for 'TODO' on patchs without false positives.

Change-Id: If43ca9e0c04637bc9e9c4e45f5b4ae0f18a32976