Feature request - Add an option to list all owned tokens

[ML-NAV]

Add an option to list all owned tokens.

Currently you have to manually add the tokens to btdex (enter the token ID).

There should be a function like 'scan network for tokens i own' and add them all to BTDEX.

To add, there should also be an option to remove/block tokens. There are some (old) scam/rubbish tokens, would be nice if a user can 'mark' these with an option to hide/don't display them.