🐛 Not possible to only have buttons (no message) anymore

[MarcusOtter]

Describe the bug

Realized thatwith the v.3.0.0 update we removed the ability to only have reply buttons, which you could previously achieve by setting the custom message to \n. Now if you set the custom message to only whitespace (or empty), the whole message will be disabled. Easiest fix would be to still send the message if the buttons aren't disabled as well. If both are disabled, don't send a message.

This means disabling the message entirely will be two steps instead of one, but it's more intuitive.

Steps to reproduce the bug

1. Set the reply message to a new line and leave buttons enabled
2. Send a message in the auto-thread channel
3. See no reply message (even when buttons are enabled)

Expected behavior

I expect to see only buttons but no text in the reply message.

[MarcusOtter]

Oh and we also need a migration script to not change the behavior for the current configs

[MarcusOtter]

Actually, it kind of works if you put either ** ** or _ _ as the reply message, as a workaround