It seems that it's not possible to save any value to persistentSettings after wallet "close event" is called.

That is the reason why I decided to implement a dropdown on Settings > Node page in #2898, and that's why I wasn't able to implement a "Don't ask me again" checkbox on the dialog.

Please check #2898.

It seems that it's not possible to save any value to persistentSettings after wallet "close event" is called.

I don't change any value after the "close event" is called is called.

That is the reason why I decided to implement a dropdown on Settings > Node page in #2898, and that's why I wasn't able to implement a "Don't ask me again" checkbox on the dialog.

I basically did the same, just on the Settings -> Interface page where it fits better IMO.

The new checkbox in settings -> interface highlighted below:

works as intended, ive tried combinations of setting / un-setting / closing / opening wallet and all changes persisted / acted correctly.

The only improvement i can think of would be to perhaps add something along the lines of ' Disable this prompt in settings -> interface ' here: (a new string to avoid translation nightmares? if this is causing headaches let me know)

i prefer this PR over #2898 , simpler / elegant
LGTM