API change, "Show OTP" shortcut

Switch to API version 4 of https://2fa.directory/api
Store API result locally and refresh weekly (configurable)

Add support for keyboard shortcuts [Ctrl] + [T] & [Ctrl] + [Shift] + [T] to copy / show OTP values

Show / Hide OTP entries in tray

You can now hide individual OTP entries in the tray, e. g. for rarely used ones.
OTP entries are shown by default, to hide an entry untick the corresponding checkbox in the OTP setup form.

Fix: Race conditions when displaying OTP values in main view

Fix: Occasional error when closing databases

Minor improvements

Optimize display of OTP in system tray
Improve texts

Improve handling of embedded OTP database

Clean up options UI
Various small improvements

Improvements and hot key support for Linux/Unix

Small improvements, especially regarding display of the KeePassOTP tab in the entry form.

Allow hot key usage on Linux / Unix to auto-type OTP

Add missing translations

Add basic support for other two factor authentications

If a website supports other two factor authentications than OTP, you can now indicate that you use one of those.
KPOTP column will show "2FA defined*" in that case.

Use the entry's context menu for that

Improvements and bugfixes

Ask for confirmation before deleting OTP settings
Show "ERROR" in KPOTP column if OTP settings are invalid