Update User and Currency classes (see latest commit at ELUBankServer).
RegistrationForm - use getters for user accounts, fix unused imports.
ClientFrame - fix menu panel alignment issues (currencies panel).
ClientFrame - fix currencies table header issue.
ClientFrame - remove background (temporary, because otherwise the elements are not visible in designer). It will be added back later.
ClientFrame - implement the transactions panel as separate component (bean).
TransactionsPanel - add necessary methods for setting accounts list and updating user interface elements.
TransactionsPanel - populate accounts list table when changing the account from the combobox.