Fixed #590 - added new attribute "accountState" for accounts

...in/java/de/deadlocker8/budgetmaster/accounts/Account.java

.../deadlocker8/budgetmaster/accounts/AccountController.java

.../de/deadlocker8/budgetmaster/accounts/AccountService.java

...va/de/deadlocker8/budgetmaster/accounts/AccountState.java

...e/deadlocker8/budgetmaster/templates/TemplateService.java

...ker8/budgetmaster/transactions/TransactionController.java

...locker8/budgetmaster/transactions/TransactionService.java

src/main/resources/templates/accounts/accounts.ftl

src/main/resources/templates/accounts/newAccount.ftl

...n/resources/templates/transactions/transactionsMacros.ftl