Prevent shutdown if trade is in process of being taken.

[ghost]

Fixes #6205

We've had a few trades that do not contain a multisig deposit TxId, even though the deposit tx is valid on the blockchain. An example is #6205. (Maybe @pazza83 can give an idea how often this happens). The deposit TxId gets written to the trade once BitcoinJ tells us the tx has been seen by peer nodes, but that can sometimes be delayed by network issues, and the remainder of the P2P negotiation can continue successfully. This leaves the trade looking ok, but if the user closes Bisq the trade will forever be without a deposit TxId. The result is a trade which cannot be completed, nor can mediation be opened by the affected trader because the deposit TxId is missing.

This PR makes a check of open trades when the user is closing the app. If any recent trades are found (less than 5 minutes old), and still in the phase TAKER_FEE_PUBLISHED, it prompts the user to please wait a bit more before closing the app.

(The popup can list more multiple trades' information in the rare case that more than one was affected - if you want a screenshot of that scenario let me know).

Anyone (e.g. @w0000000t) if the popup message does not appear clear to you, please feel free to suggest improvements.

[ripcurlx]

utACK - So as soon as there is one trade that had the taker fee tx published within the last five minutes we show this warning. Would be great if we can get rid of those nasty support cases 👍

[w0000000t]

Thanks for pinging me @jmacxx
Just my 2 sats, for something like this, which is "major" IMO (that is, trade being seriously messed up if user proceeds) I would expect something flashier.
My selective blindness saw the attached image and just scrolled past, "hey where's this popup jmacxx was talking about?", then I realized, "is it that innocuous looking notice?" and yes it was 😄

Here goes my suggestions:

1. Make the popup a red error-ish one so it catches user attention
2. cut the text to a minimum so people actually take the time to read and maybe understand what's writter in there
3. remove the "don't show again" checkbox, we want users to actually go proactive at closing bisq by ignoring the issue, otherwise they shouldn't be able to, so double choice: "Close anyway (DANGER!)" and "Wait a while and try again in a minute"
4. make it so that at next attempt to close Bisq, warning will be shown once again if the initialization wasn't completed yet

Idea about texts:
Popup content

Trade [blahblah] has not finished initializing; closing now will probably make it corrupted. Please wait a minute and try again.
(if this is the Nth time you tried and still see this, click to download the log to your favorite location and attach it on (GitHub issues/bisq.chat)

Button text:

[RISK: close anyway] [wait]

[ghost]

😄 @w0000000t That's very good feedback - I'll work on adopting it. Thankyou.