LIVE-2162 Solana fixes after initial staking

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🦒 Context (issues, jira)

https://ledgerhq.atlassian.net/browse/LIVE-2162

💻 Description / Demo (image or video)

Specs of the changes are described here: https://docs.google.com/document/d/1QvlLnoLBkXZ3xul7cHajYzqVjolSTj0tJ64YPfkjvG8/edit

🖤 Expectations to reach

PR must pass CI, rebase develop if conflicts. Thanks!

• on QA: at least one of these two checkboxes must be checked:
  • [ ] a specific test planned is defined on Jira
  • [ ] this PR is covered by automatic UI test
• on delivery: at least one of these two checkboxes must be checked:
  • [ ] Option 1: no impact: The changes of this PR have ZERO impact on the userland (invisible for users)
  • [x] Option 2: atomic delivery: the changes is atomic and complete (no partial delivery)

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Coverage report

St.:grey_question:	Category	Percentage	Covered / Total
🔴	Statements	23.46%	38/162
🔴	Branches	20.51%	8/39
🔴	Functions	3.64%	2/55
🔴	Lines	24.16%	36/149

Test suite run success

2 tests passing in 2 suites.

Report generated by 🧪jest coverage report action from 54102a47cb5a2a51c6f5a86e7d6b02ccfc49b6c3

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/generate-screenshots

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Generating new screenshots

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/generate-screenshots

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Generating new screenshots