fix(#4043): Ability show balance in navbar dropdown

[vikiival]

• 🐍 snek is a default prefix
• 🐛 unable to fetch balance for tokens

The issue was caused by me :) i changed the const to getter and forgot to check the implementation 😢

Thank you for your contribution to the KodaDot NFT gallery.
👇 _ Let's make a quick check before the contribution.

PR type

• Bugfix
• Feature
• Refactoring

What's new?

• PR closes Zero balance on Basilisk even showing non-zero in assets page  #4043
• Requires deployment <rubick/magick_issue>
• <brief_description_of_what_I've_added>

Screenshot

• My fix has changed something on UI; a screenshot is best to understand changes for others.

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[codeclimate]

Code Climate has analyzed commit 9c22d75 and detected 0 issues on this pull request.

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[petersopko]

I wonder why do you still see unit instead of KSM in the screenshot you attached (checked beta/prod and it's KSM for me)

[yangwao]

bsx first in selector

balance, umm

when I went to assets, it shows

[petersopko]

umm, this is what I'm seeing after this PR, on this deploy and on main ? (I have both KSM and BSX in different amounts)