Review technical content: Desktop Wallet sections under "Account activities"

[TinaKT]

Technical review of Desktop Wallet-specific content found within the Account activities section. Review only the Desktop Wallet parts of each page.

Review focus:

• Correctness of all technical information
• Completeness of information
• Removal of irrelevant or redundant information

Review is complete when:

• All technical information has been verified
• Missing information has been identified and added
• Irrelevant or redundant information has been deleted
• PR with necessary changes has been submitted

Pages to review (Desktop Wallet content only):

1. Send CCD: https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/guides/send-ccd-wallets.rst
2. Add a validator: https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/mobile-wallet/add-baker-mw.rst
3. Change validator options: https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/mobile-wallet/update-baker-mw.rst
4. Delegate to a staking pool or passive delegation: https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/guides/add-delegation.rst
5. Remove delegation to a staking pool or passive delegation: https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/guides/remove-delegation.rst
6. Update delegation to a staking pool or passive delegation: https://github.com/Concordium/concordium.github.io/blob/main/source/mainnet/docs/guides/update-delegation.rst

Note: A separate review of language and style will be conducted after the technical review is complete.