Urgent TODOs:

- General:
  * not only Nora dark-theme, but default light! (CSS)
  * auto-focus on input fields is not working well
  * buttons should be visibly insensitive
    as long as required input fields are not
    working
  * next required invalid/missing input field is
    not properly highlighted in red
  * Logout button needs more padding to the right (CSS)

- Error bar:
  * shows JSON, should only show good error message
    and numeric code, not JSON syntax
  * should auto-hide after next action, no need for
    "clear"!
  * need variant "status bar" in green (or blue)
    which shows status of last operation

* H1-Titles:
  * Center more (currently way on the left) (CSS)

- Assets:
  * Numeric amount needs to be shown MUCH bigger (CSS)
  * Center more? (CSS)

- Payments:
  * Amount to withdraw currently shown in white-on-white (CSS)
  * Big frame drawn around notebook-tabs is not nice (CSS)
  * Center more? (CSS)
  * "Wire to bank account"
    - maybe split two types (payto and IBAN) into
      two tabs?
    - currently cannot switch back from payto to IBAN

- Withdraw:
  * Should use new 'status' bar at the end, instead
    of extra dialog with "close" button
  * ditto for bank-wire-transfer final stage

- Footer:
  * overlaps with transaction history or other
    content, needs to consistently show at the
    end! => change rendering logic!? (CSS?)