Settings structure

[myxmaster]

Describe your enhancement idea

Right now there are 2 things that in some way are "Settings", but they are not listed under Settings:

• Lightning address -> gear icon
• Tools-> Accounts

I was thinking about this in context of an export/import settings feature (#1877). I guess it would be confusing for people if they export and import their settings, but then accounts are not there or lightning address settings are still default.