Ignore download limit in protected (verified, green-checkmarked) 1:1 chats

[link2xt]

Here is a message with a large video and verified signature is received:

We don't know yet that it has a signature of a verified key. When we download it, the message appears in place but fixes the chat type, it becomes verified:

This is unexpected because a message with actually a good signature appears in the section marked as unverified, above the large green checkmark.

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Later, we get a green checkmark back:

Then we receive a large message and don't know yet that it is signed with unverified key:

"Setup changed" is due to Autocrypt key change which comes from already downloaded Autocrypt header.

Now we download the message:

Green checkmark breaks, but the video with wrong signature appears in the "guaranteed e2e" section!