feat: add mana decay balance to address page

[VmMad]

Description of change

Fixes #1199

Type of change

• Enhancement (a non-breaking change which adds functionality)

How the change has been tested

alphanet/addr/rms1pzkvnshkrkjx4n4grchsythcdlu4m9q6p0ps0ktxanc3erd2mzjy52ce6ee
alphanet/addr/rms1zrl935e5lrnuwmlfdqez679dnja774gtlny3gq4ahpeuf4ktqulh55gfkqe

Change checklist

Add an x to the boxes that are relevant to your changes, and delete any items that are not.

• My code follows the contribution guidelines for this project
• I have performed a self-review of my own code
• [] I have commented my code, particularly in hard-to-understand areas
• [] I have made corresponding changes to the documentation
• [] I have added tests that prove my fix is effective or that my feature works
• [] New and existing unit tests pass locally with my changes