Allow Multiple Account Transaction Modification
In the advanced mode, only one account may have its transactions modified. The GUI should be adjusted to allow editing the transactions of multiple accounts at a time.
1. Adding a new transaction should appear for both accounts
2. Editing a transaction should appear for both accounts
3. Removing a transaction should remove it for both accounts
When saving all transactions should be saved. If there is an error in a transaction, the account should be highlighted in red to indicate that there is an issue. This will notify the user that there is an issue saving the account and allow the user to click on the account to display its transactions and see the error message.
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