[Task]: Add storage rent balance

[luca-moser]

As a token holder, I want to see the # of tokens used to cover the storage rent in total over my address, so I can asses whether it is worth consolidating outputs.

Acceptance criteria:

• See the sum of storage rent used over all outputs belonging to the address (excluding those with SDRUC)
• See the value in fiat currency of the storage rent
• A tooltip explains what the value represents and why it exists.

Check whether there is an implementation in iota.js to calculate the virtual byte cost of an output.

An output needs to have a minimum deposit amount wich covers the virtual byte cost in terms of storage the output takes up.