* NEW
    + newly added transactions are visible in transaction list without a refresh
* IMPROVEMENTS
    + finished migration to fully asynchronous database layer
    + better responsiveness when switching from the account list to the transaction list for the first time
* FIXES
    + fix layout glitches in template editor
    + fix error handling while trying different JSON API versions
    + stop resetting the date when an old transaction is loaded
    + several smaller fixes