#57 Update stake page UI

[nevendyulgerov]

This is how the stake page looks after the changes: https://github.com/cartesi/explorer/assets/6005179/7cab075c-f029-41ac-93a9-afd960a0e4ae

[vercel[bot]]

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Name	Status	Preview	Comments	Updated (UTC)
rollups	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 10, 2023 7:57am
staking	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 10, 2023 7:57am

[coveralls]

Pull Request Test Coverage Report for Build 5818352459

• 32 of 32 (100.0%) changed or added relevant lines in 5 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.1%) to 73.143%

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Totals
Change from base Build 5812043593:	0.1%
Covered Lines:	2650
Relevant Lines:	3445

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💛 - Coveralls