fix blocking createPasswordUI() when OTP is displayed

[agrahn]

If the decrypted entry in the store contains an OTP, function createPasswordUI() becomes a blocking function. In this case, startAutoDismissTimer() and onSuccess() that come after createPasswordUI() in function decryptWithPassphrase() are not reached and executed. As a consequence, passphrase caching is not carried out and the passphrase must be entered again in order to decrypt another entry in the store.

The bug can be reproduced as follows:

1. Start APS, ensure that passphrase caching and auto-clean on screen-off are enabled.
2. Select a store entry with an OTP, unlock the cache with the screen-lock PIN and decrypt the entry with your passphrase
3. Select another (or the same) entry from the password list
4. Enter the PIN --> APS asks again for your passphrase, which should not be necessary if the previously entered passphrase were cached properly.

This PR tries to fix the issue.